US Patent No: 5,029,183

Number of patents in Portfolio can not be more than 2000

Packet data communication network

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Abstract

A packet data transmission system is used to link a number of remote hand-held data-gathering units such as bar code readers to a central computer which maintains a database management system. Data packets are sent from the remote units by an RF link to intermediate base stations, then sent by the base stations to the central computer by a serial link. Direct sequence spread spectrum modulation is used for the RF link. The remote hand-held units initiate an exhange using RF transmission to and from the base stations, receiving only during a rigid time window following a transmission from the remote unit. The base stations cannot initiate communication to the remote units, but instead send data to the remote units only as part of the exchange.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SYMBOL TECHNOLOGIES, INC.HOLTSVILLE, NY1885

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tymes, LaRoy Cameron Park, CA 11 1478

Cited Art

Patent Info (Count) # Cites Year
 
SYMBOL TECHNOLOGIES, INC. (5)
4,409,470 Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols 325 1982
4,460,120 Narrow bodied, single- and twin-windowed portable laser scanning head for reading bar code symbols 250 1983
4,673,805 Narrow-bodied, single- and twin-windowed portable scanning head for reading bar code symbols 136 1983
4,736,095 Narrow-bodied, single- and twin-windowed portable laser scanning head for reading bar code symbols 142 1986
4,758,717 Narrow-bodied, single-and twin-windowed portable laser scanning head for reading bar code symbols 193 1986
 
Bell Telephone Laboratories, Incorporated (2)
4,639,914 Wireless PBX/LAN system with optimum combining 173 1984
4,789,983 Wireless network for wideband indoor communications 205 1987
 
AT&T Company and AT&T Bell Laboratories (1)
4,672,658 Spread spectrum wireless PBX 304 1986
 
BHL PATENT HOLDINGS LLC (1)
2002/0143,320 Tracking medical products with integrated circuits 2 2002
 
FAIRCHILD WESTON SYSTEMS INC. (1)
4,829,540 Secure communication system for multiple remote units 89 1987
 
Hughes Aircraft Company (1)
4,740,792 Vehicle location system 285 1986
 
MCKESSON INFORMATION SOLUTIONS INC. (1)
4,850,009 Portable handheld terminal including optical bar code reader and electromagnetic transceiver means for interactive wireless communication with a base communications station 354 1988
 
MITRE CORPORATION, THE (1)
4,291,409 Spread spectrum communications method and apparatus 152 1978
 
MOTOROLA, INC. (1)
4,247,908 Re-linked portable data terminal controller system 142 1978
 
Other [Check patent profile for assignment information] (1)
4,475,208 Wired spread spectrum data communication system 127 1982

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
SYMBOL TECHNOLOGIES, INC. (54)
5,157,687 Packet data communication network 287 1990
5,142,550 Packet data communication system 143 1990
5,280,498 Packet data communication system 172 1991
5,302,813 Multi-bit digitizer 30 1992
5,340,972 Hands-free bar code scanner with finger activated optical control 50 1992
5,418,812 Radio network initialization method and apparatus 74 1992
5,401,944 Traveler security and luggage control system 87 1992
5,393,965 Flexible merchandise checkout and inventory management system 108 1992
5,528,621 Packet data communication system 147 1993
5,519,577 Spread spectrum radio incorporated in a PCMCIA Type II card holder 44 1993
5,479,441 Packet data communication system 82 1994
5,644,601 Method and apparatus for bias suppression in a VCO based FM transmission system 34 1994
6,082,621 Interface between threshold processing digitizer for bar code reader 17 1994
5,668,803 Protocol for packet data communication system 236 1994
5,449,893 Digitizer for bar code reader 22 1994
5,812,589 Radio network initialization method and apparatus 38 1995
6,170,749 Method of scanning indicia using selective sampling 39 1995
5,734,152 Optical scanners and signal processors therefor 19 1995
5,754,587 Method and apparatus for bias suppression in a VCO based FM transmission system 31 1996
5,838,720 Transceiver control with sleep mode operation 89 1996
6,236,674 Transceiver control with sleep mode operation 82 1996
6,164,540 Optical scanners 34 1996
6,067,297 Embedded access point supporting communication with mobile unit operating in power-saving mode 181 1996
5,848,064 Wireless software upgrades with version control 165 1996
6,010,071 Finger-mounted electro-optical scanner with on-board short range radio transmitter 8 1997
6,535,493 Mobile internet communication protocol 208 1998
6,031,830 Wireless software upgrades with version control 53 1998
6,069,911 Radio network initialization method and apparatus 0 1998
6,188,681 Method and apparatus for determining alternative second stationary access point in response to detecting impeded wireless connection 54 1998
6,169,769 Method and apparatus for bias suppression in a VCO based FM transmission system 6 1998
6,826,756 Automatic transfer of data from an input device to a software application 3 1998
6,237,053 Configurable operating system having multiple data conversion applications for I/O connectivity 9 1998
6,694,366 Data reconciliation between a computer and a mobile data collection terminal 31 1998
6,484,029 Apparatus and methods for adapting mobile unit to wireless LAN 45 1998
6,643,506 Wireless software upgrades with version control 58 1998
6,308,061 Wireless software upgrades with version control 65 1999
7,358,857 Global positioning systems applications 10 1999
6,209,788 Optical scanners 33 1999
7,492,248 Multi-tier wireless communications architecture, applications and methods 3 2000
6,404,772 Voice and data wireless communications network and method 125 2000
7,126,926 Multi-tier wireless communications architecture, applications and methods 26 2000
7,206,849 Communication in a wireless communications network when a mobile computer terminal may be unreachable 7 2000
6,675,203 Collecting data in a batch mode in a wireless communications network with impeded communication 19 2000
7,260,395 Apparatus and method for wireless local area networks of different countries 4 2000
6,547,142 Method of scanning indicia using selective sampling 33 2000
6,996,634 Configurable operating system for control of a mobile I/O device 5 2001
6,732,933 Coupling of bar code data readers to mobile terminals operable in wireless networks 17 2001
7,494,064 ASIC for supporting multiple functions of a portable data collection device 1 2001
7,040,538 Bar code reader including linear sensor array and hybrid camera and bar code reader 6 2002
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8,149,796 Voice and data wireless communications network and method 0 2005
7,339,905 Wireless communication system for telephonic calls 1 2006
7,693,101 Apparatus for interfacing a wireless local network and a wired voice telecommunications system 3 2006
7,738,865 Apparatus and method for wireless local area networks of different countries 0 2007
 
BROADCOM CORPORATION (49)
5,602,854 Wireless personal local area network utilizing removable radio frequency modules with digital interfaces and idle sense communication protocol 54 1993
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5,790,536 Hierarchical communication system providing intelligent data, program and processing migration 92 1995
6,654,378 Transaction control system including portable data terminal and mobile customer service station 20 1995
5,682,379 Wireless personal local area network 162 1996
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6,084,867 Apparatus and method of routing data in a radio frequency local area network 60 1998
6,614,768 Enhanced mobility and address resolution in a wireless premises based network 36 1998
6,970,434 Hierarchical communication system providing intelligent data, program and processing migration 35 1998
6,864,558 Layout technique for C3MOS inductive broadbanding 5 2001
7,606,575 Remote radio data communication system with data rate switching 2 2002
6,895,450 Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery 7 2002
6,937,080 Current-controlled CMOS logic family 24 2002
6,900,670 Current-controlled CMOS logic family 5 2002
7,907,577 Communication network providing wireless and hard-wired dynamic routing 0 2002
6,911,855 Current-controlled CMOS circuit using higher voltage supply in low voltage CMOS process 18 2002
6,897,697 Current-controlled CMOS circuit using higher voltage supply in low voltage CMOS process 15 2002
6,909,309 Current-controlled CMOS circuits with inductive broadbanding 10 2002
7,606,287 Radio frequency communication network having adaptive communication parameters 2 2003
7,109,799 Current-controlled CMOS wideband data amplifier circuits 3 2003
7,471,651 Transaction control system including portable data terminal and mobile customer service station 4 2003
7,885,242 Enhanced mobility and address resolution in a wireless premises based network 1 2003
7,440,416 Hierarchical communication system providing intelligent data, program and processing migration 14 2003
7,672,674 Remote radio data communication system with data rate switching 2 2004
7,132,727 Layout technique for C3MOS inductive broadbanding 0 2004
7,135,889 Universal single-ended parallel bus 0 2004
6,982,583 Current-controlled CMOS circuit using higher voltage supply in low voltage CMOS process 15 2004
7,415,548 Communication network having a plurality of bridging nodes which transmits a polling message with backward learning technique to determine communication pathway 8 2004
7,609,747 Radio frequency communication network having adaptive communication parameters 3 2005
8,180,928 Method and system for supporting read operations with CRC for iSCSI and iSCSI chimney 0 2005
7,996,573 Method and system for supporting read operations with CRC for iSCSI and iSCSI chimney 0 2005
7,598,788 Current-controlled CMOS (C3MOS) fully differential integrated delay cell with variable delay and high bandwidth 1 2005
7,362,174 Current-controlled CMOS (C3MOS) wideband input data amplifier for reduced differential and common-mode reflection 0 2005
7,510,121 Multi-level hierarchical radio-frequency communication system 9 2006
7,633,919 Communication network providing wireless and hard-wired dynamic routing 0 2006
8,116,203 Multiple virtual channels for use in network devices 0 2007
8,135,016 System and method for identifying upper layer protocol message boundaries 1 2007
8,402,142 System and method for TCP/IP offload independent of bandwidth delay product 0 2007
7,849,208 System and method for TCP offload 0 2008
7,912,064 System and method for handling out-of-order frames 1 2008
7,899,951 Communication network having a plurality of bridging nodes which transmits a polling message with backward learning technique to determine communication pathway 1 2008
7,969,911 Hierarchical communication system providing intelligent data, program and processing migration 0 2008
7,724,057 Current-controlled CMOS logic family 1 2009
7,919,985 Current-controlled CMOS circuits with inductive broadbanding 1 2009
7,934,021 System and method for network interfacing 2 2009
7,929,540 System and method for handling out-of-order frames 4 2010
8,451,863 System and method for identifying upper layer protocol message boundaries 0 2010
8,345,689 System and method for identifying upper layer protocol message boundaries 0 2010
8,299,834 Current-controlled CMOS logic family 0 2010
 
TRAPEZE NETWORKS, INC. (22)
7,221,927 Station mobility between access points 19 2004
7,573,859 System and method for remote monitoring in a wireless network 16 2006
8,457,031 System and method for reliable multicast 0 2006
7,724,703 System and method for wireless network monitoring 12 2006
7,529,925 System and method for distributing keys in a wireless network 21 2006
7,551,619 Identity-based networking 18 2006
7,558,266 System and method for restricting network access using forwarding databases 10 2006
7,577,453 Wireless load balancing across bands 18 2006
7,724,704 Wireless VLAN system and method 15 2006
8,250,587 Non-persistent and persistent information setting method and system for inter-process communication 0 2006
7,873,061 System and method for aggregation and queuing in a wireless network 10 2006
8,340,110 Quality of service provisioning for wireless networks 0 2007
8,238,942 Wireless station location detection 0 2007
8,126,481 Wireless station location detection 0 2007
7,865,713 Application-aware wireless network system and method 11 2007
8,150,357 Smoothing filter for irregular update intervals 1 2008
8,238,298 Picking an optimal channel for an access point in a wireless network 0 2008
8,161,278 System and method for distributing keys in a wireless network 2 2009
8,270,408 Identity-based networking 0 2009
8,218,449 System and method for remote monitoring in a wireless network 1 2009
7,865,213 Tuned directional antennas 0 2009
8,116,275 System and network for wireless network monitoring 5 2010
 
Metrologic Instruments, Inc. (19)
5,808,285 Portable code symbol reading device with one-way wireless data packet transmission link to base unit employing condition-dependent acoustical signalling for data packet reception acknowledgement 35 1994
5,979,766 Bar code symbol reading system having one-way RF signal-receiving keyboard wedge interface 13 1997
6,290,131 Optical scanner adapted for direct interfacing to a data communications network 24 1999
7,077,327 System for reading bar code symbols using bar code readers having RF signal transmission links with base stations 132 1999
6,460,769 System for reading bar code symbols using portable bar code symbol readers having one-way RF signal transmission links with base stations 6 2001
6,688,527 Bar code scanning system with wireless communication links 6 2001
6,550,680 Optical scanner adapted for interfacing to a data communications network 0 2001
7,028,904 WIRELESS BAR CODE SYMBOL READING SYSTEM CAPABLE OF AUTOMATICALLY COLLECTING AND STORING SYMBOL CHARACTER DATA WHEN HAND-SUPPORTABLE UNIT IS OPERATED OUTSIDE OF ITS RF DATA COMMUNICATION RANGE, AND AUTOMATICALLY TRANSMITTING STORED SYMBOL CHARACTER DATA WHEN THE HAND-SUPPORTABLE UNIT IS OPERATED WITHIN ITS RF DATA COMMUNICATION RANGE 4 2003
7,325,740 Automatically-activated laser scanning 2D bar code symbol reading system employing a visible linear-type laser scanning pattern and an audible feedback signal during scan data capturing and buffering operations 4 2003
7,137,561 Wireless laser scanning bar code symbol reading system employing a low-battery protection circuit, vibrational alarm and sleep mode of operation 1 2003
7,281,663 Wireless bar code symbol reading system having hand-supportable unit and remote base station 2 2003
7,048,192 Wireless bar code symbol reading system employing a base station with a cradle having a hinged support hooks for enabling vertical and horizontal installations 2 2003
7,007,849 AUTOMATICALLY-ACTIVATED HAND-SUPPORTABLE 2-D BAR CODE SYMBOL READING SYSTEM EMPLOYING A LINEAR LASER SCANNING PATTERN GENERATOR, AN AUTOMATIC BAR CODE SYMBOL DATA DETECTOR, AUDIBLE DATA CAPTURE FEEDBACK GENERATOR, AND A MANUALLY-ACTIVATED DATA TRANSMISSION ACTIVATION SWITCH 4 2003
7,278,578 Automatically-activated wireless laser scanning 2D bar code symbol reading system capable of automatically transmitting stored symbol character data when the hand-supportable unit is operated within its RF data communication range and automatically collecting and storing symbol character data when the hand-supportable unit is operated outside of its RF data communication range 0 2003
7,172,126 Wireless automatic laser scanning bar code symbol reading system, wherein the RF-based transceiver chipsets within the wireless hand-supportable unit and base station thereof are automatically deactivated and said RF data communication link therebetween terminated when said system enters its power-saving sleep mode, and reactivated and re-established when re-entering its operational mode 4 2003
7,040,540 Bar code scanning system with wireless communication links 1 2003
7,111,786 Automatically-activated wireless hand-supportable laser scanning bar code symbol reading system with data transmission activation switch and automatic communication range dependent control 6 2004
7,464,878 Automatically-activated wireless hand-supportable laser scanning bar code symbol reading system with automatic communication range dependent control 2 2006
7,686,225 Wireless code symbol reading system with automatic communication range dependent control 0 2007
 
INNOVATIO IP VENTURES (15)
5,295,154 Radio frequency local area network 287 1993
5,428,636 Radio frequency local area network 139 1993
5,740,366 Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery 123 1995
5,504,746 Radio frequency local area network 126 1995
5,940,771 Network supporting roaming, sleeping terminals 210 1995
6,374,311 Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery 79 1998
6,046,992 Radio frequency local area network 85 1998
7,558,557 Low-power messaging in a network supporting roaming terminals 7 1999
6,826,165 Radio frequency local area network 19 2000
7,536,167 Network supporting roaming, sleeping terminals 5 2003
7,457,646 Radio frequency local area network 2 2003
7,552,246 Communication network having a plurality of bridging nodes which transmit a beacon to terminal nodes in power saving state that it has messages awaiting delivery 6 2003
7,483,397 Radio frequency local area network 4 2004
7,917,145 Radio frequency local area network 2 2008
7,873,343 Communication network terminal with sleep capability 0 2009
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (10)
5,917,629 Transceiver for extending a CSMA/CD network for wireless communication 84 1990
5,239,673 Scheduling methods for efficient frequency reuse in a multi-cell wireless network served by a wired local area network 42 1990
5,212,806 Distributed control methods for management of migrating data stations in a wireless communications network 88 1990
5,198,918 Control method and apparatus for a wireless data link 1990
5,181,200 Handoff method and apparatus for mobile wireless workstation 181 1990
5,159,592 Network address management for a wired network supporting wireless communication to a plurality of mobile users 516 1990
5,274,841 Methods for polling mobile users in a multiple cell wireless network 57 1993
5,321,542 Control method and apparatus for wireless data link 149 1993
6,754,259 Low-cost radio frequency (RF) link for point-to-point data transfer 0 1999
6,792,479 System and method for fibre channel tracking of SCSI identifiers in known configurations 10 2001
 
INPRO II LICENSING SARL (9)
5,835,732 Miniature digital assistant having enhanced host communication 157 1993
5,634,080 Hand-held portable computer having an electroluminescent flat-panel display with pixel elements at right angles to the plane of the display and an excitation direction parallel to the plane of the display 73 1994
5,600,800 Personal computer system having a docking bay and a hand-held portable computer adapted to dock in the docking bay by a full-service parallel bus 78 1994
5,579,489 Hand-held portable computer having capability for external expansion of an internal bus 68 1994
5,590,382 Personal digital assistant module having a multi-portion keyboard with inductive coupling 24 1994
5,689,654 Digital assistant system including a host computer with a docking bay for the digital assistant wherein a heat sink is moved into contact with a docked digital assistant for cooling the digital assistant 119 1994
5,721,837 Micro-personal digital assistant including a temperature managed CPU 78 1996
5,793,957 Satellite digital assistant and host/satellite computer system wherein coupling the host and the satellite by a host interface communication system results in digital communication and synchronization of files 23 1996
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HAND HELD PRODUCTS, INC. (7)
7,717,342 Data collection device having dynamic access to multiple wireless networks 6 2006
7,874,483 Encoded information reading terminal with wireless path selection capability 7 2007
8,191,785 Encoded information reading terminal operating in infrastructure mode and ad-hoc mode 0 2009
8,256,681 Data collection device having dynamic access to multiple wireless networks 0 2010
8,162,225 Data collection device having dynamic access to multiple wireless networks 0 2010
8,181,871 Encoded information reading terminal with wireless path selection capability 0 2011
8,360,319 Encoded information reading terminal operating in infrastructure more and AD-HOC mode 0 2012
 
MISTAL SOFTWARE LIMITED LIABILITY COMPANY (6)
7,420,458 Secondary card reader 7 2005
7,298,264 RFID tag filtering and monitoring 10 2005
7,432,811 RFID tag filtering and monitoring 3 2006
8,072,314 Secondary card reader 2 2008
7,952,480 RFID tag filtering and monitoring 0 2008
8,258,956 RFID tag filtering and monitoring 0 2011
 
NIKE, INC. (5)
7,200,517 Monitoring activity of a user in locomotion on foot 66 2005
7,428,471 Monitoring activity of a user in locomotion on foot 5 2006
7,617,071 Monitoring activity of a user in locomotion on foot 7 2007
7,428,472 Monitoring activity of a user in locomotion on foot 8 2007
7,962,312 Monitoring activity of a user in locomotion on foot 1 2009
 
DataQuill Limited (4)
7,139,591 Hand held telecommunications and data entry device 17 2004
7,505,785 Data entry systems 25 2006
7,920,898 Data entry systems 0 2009
8,290,538 Data entry systems 0 2011
 
FITSENSE TECHNOLOGY, INC. (4)
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7,937,121 Intelligent data network with power management capabilities 0 2008
8,150,424 Intelligent data network with power management capabilities 0 2011
 
INTERMEC IP CORP. (4)
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5,694,318 Vehicular data system for communicating with remote host 28 1995
5,928,292 Vehicular data system for communicating with remote host 52 1997
5,895,431 Communication system used to assist deliveries of goods or services 20 1997
 
KABUSHIKI KAISHA TOSHIBA (3)
5,561,686 Radio information communication system using multi-carrier spread spectrum transmission system 23 1994
5,742,508 Air control supporting system 5 1996
7,140,545 Optical reading device and portable communication equipment having the optical reading device 0 2002
 
MARSHALL FEATURE RECOGNITION, LLC (3)
6,866,196 Method and apparatus for accessing electronic data via a familiar printed medium 47 1999
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MILLENNIAL NET, INC. (3)
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7,948,930 Network protocol 5 2008
8,098,615 Network protocol 0 2011
 
RESEARCH IN MOTION LIMITED (3)
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7,826,471 Multi-beam cellular communication system 5 2003
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2201028 ONTARIO INC. (2)
6,920,128 TDMA packet data communication system 7 1999
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APPLE INC. (2)
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BONITA SOFTWARE, INC. (2)
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CYPRESS SEMICONDUCTOR CORPORATION (2)
6,665,265 Overhead serial communication scheme 2 1999
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HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (2)
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5,745,479 Error detection in a wireless LAN environment 46 1995
 
INTEL CORPORATION (2)
6,621,852 Spread spectrum wireless communication system 1 2001
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JUNIPER NETWORKS, INC. (2)
8,072,952 Load balancing 1 2007
8,446,890 Load balancing 0 2011
 
MOTOROLA, INC. (2)
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QUALCOMM INCORPORATED (2)
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SHARP LABORATORIES OF AMERICA, INC. (2)
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WELCH ALLYN DATA COLLECTION, INC. (2)
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BELDEN INC. (1)
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BJ SERVICES COMPANY (1)
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CHRYSLER GROUP LLC (1)
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CORDATA, INC. (BVI) (1)
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DATALOGIC MOBILE, INC. (1)
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Echelon Corporation (1)
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FACEBOOK, INC. (1)
7,907,966 System and method for cross-platform applications on a wireless phone 10 2005
 
FLORIDA STATE UNIVERSITY RESEARCH FOUNDATION (1)
7,817,640 Fair round robin scheduler for network systems 0 2004
 
FUJI JUKOGYO KABUSHIKI KAISHA (1)
5,758,300 Diagnosis system for motor vehicles and the method thereof 154 1997
 
HONEYWELL INTERNATIONAL INC. (1)
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INTEGRATED DEVICE TECHNOLOGY, INC. (1)
5,175,512 High speed, power supply independent CMOS voltage controlled ring oscillator with level shifting circuit 32 1992
 
Inteligistics, Inc. (1)
7,978,060 Identification system 0 2006
 
INTERMEC CORPORATION (1)
5,602,380 Barcode scanner-reader wireless infrared link 13 1995
 
LABARGE-OCS, INC. (1)
6,618,394 Methods and apparatus for economical utilization of communication networks 19 1999
 
Lochner, Scott (1)
7,035,598 Modular computer system 1 2001
 
LUCENT TECHNOLOGIES INC. (1)
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
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Mobile Aspects, Inc. (1)
8,414,471 Endoscope storage cabinet, tracking system, and signal emitting member 0 2009
 
MOTOROLA MOBILITY LLC (1)
6,161,207 Communications unit and method of communicating having efficient packet acknowledgement 25 1996
 
MOTOROLA SOLUTIONS, INC. (1)
5,430,775 Method and apparatus for a radio communication system 12 1994
 
NEC CORPORATION (1)
6,172,982 Communication control system and method of controlling communication 2 1998
 
NORAND CORP0RATION (1)
5,657,317 Hierarchical communication system using premises, peripheral and vehicular local area networking 139 1994
 
OPEN TEXT S.A. (1)
7,443,811 Transmitting data 2 2004
 
ORATIVE CORPORATION (1)
7,269,405 System and method for proxy-enabling a wireless device to an existing IP-based service 2 2005
 
PDACO LTD. (1)
5,615,393 Computer system having a cordless keyboard and an induction coil in a plug-in electronic card module 20 1996
 
PHILIP MORRIS USA INC. (1)
7,624,918 Wireless identification based display 2 2005
 
PSC, INC. (1)
5,581,707 System for wireless collection of data from a plurality of remote data collection units such as portable bar code readers 26 1994
 
SHARP KABUSHIKI KAISHA (1)
7,450,922 Data unit detection including antenna diversity 0 2004
 
TECHNIKU INCORPORATED (1)
5,134,347 Low power consumption wireless data transmission and control system 67 1991
 
TELXON CORPORATION (1)
6,968,184 Wireless software upgrades with version control 65 2003
 
TRAPEZE NETWORKS (1)
7,912,982 Wireless routing selection system and method 12 2006
 
UNITED PARCEL SERVICE OF AMERICA, INC. (1)
5,804,802 Two-way data communication manager 37 1996
 
Windata, Inc. (1)
5,276,703 Wireless local area network communications system 241 1992
 
XTec, Incorporated (1)
7,014,103 Differential radio frequency identification reader 2 2004
 
Other [Check patent profile for assignment information] (3)
5,978,772 Merchandise checkout system 73 1997
8,179,859 Roaming encoded information reading terminal 1 2008
8,306,005 Dynamic communication and method of use 0 2011