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

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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, NY1783

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tymes, LaRoy Cameron Park, CA 11 1775

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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BHL PATENT HOLDINGS LLC (1)
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* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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7,969,911 Hierarchical communication system providing intelligent data, program and processing migration 15 2008
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7,724,057 Current-controlled CMOS logic family 3 2009
7,919,985 Current-controlled CMOS circuits with inductive broadbanding 2 2009
7,934,021 System and method for network interfacing 2 2009
7,929,540 System and method for handling out-of-order frames 7 2010
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8,299,834 Current-controlled CMOS logic family 1 2010
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8,818,322 Untethered access point mesh system and method 0 2007
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8,161,278 System and method for distributing keys in a wireless network 10 2009
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OPEN TEXT S.A. (1)
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SYMBOL TECHNOLOGIES, INC. (56)
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SHARP LABORATORIES OF AMERICA, INC. (2)
6,505,037 Data unit detection including antenna diversity 7 2000
6,859,504 Rapid settling automatic gain control with minimal signal distortion 8 2000
 
2201028 ONTARIO INC. (2)
6,920,128 TDMA packet data communication system 10 1999
* 6,522,638 Packet data communication system with buffered data and control channels 13 1999
 
TELXON CORPORATION (1)
6,968,184 Wireless software upgrades with version control 81 2003
 
THE NIELSEN COMPANY (US), LLC (2)
8,855,101 Methods, systems, and apparatus to synchronize actions of audio source monitors 0 2010
8,824,242 Methods, systems, and apparatus to calculate distance from audio sources 0 2011
 
Inteligistics, Inc. (1)
7,978,060 Identification system 1 2006
 
HONEYWELL INTERNATIONAL INC. (1)
* 7,239,229 Efficient protocol for reading RFID tags 6 2002
 
INPRO II LICENSING SARL (9)
* 5,835,732 Miniature digital assistant having enhanced host communication 195 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 87 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 85 1994
* 5,579,489 Hand-held portable computer having capability for external expansion of an internal bus 77 1994
* 5,590,382 Personal digital assistant module having a multi-portion keyboard with inductive coupling 25 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 198 1994
* 5,721,837 Micro-personal digital assistant including a temperature managed CPU 83 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 26 1996
6,523,079 Micropersonal digital assistant 64 2001
 
ADC TELECOMMUNICATIONS, INC. (2)
* 8,699,982 Systems and methods for implementing a distributed antenna system in a radio frequency integrated circuit 0 2012
* 2013/0260,706 SYSTEMS AND METHODS FOR IMPLEMENTING A DISTRIBUTED ANTENNA SYSTEM IN A RADIO FREQUENCY INTEGRATED CIRCUIT 0 2012
 
Windata, Inc. (1)
* 5,276,703 Wireless local area network communications system 260 1992
 
INNOVATIO IP VENTURES (1)
7,873,343 Communication network terminal with sleep capability 37 2009
 
RPX CORPORATION (2)
* 6,665,265 Overhead serial communication scheme 2 1999
7,334,147 Method and architecture for synchronizing a path generator and/or extractor to a processor 0 2002
 
FACEBOOK, INC. (1)
7,907,966 System and method for cross-platform applications on a wireless phone 41 2005
 
BONITA SOFTWARE, INC. (2)
6,859,462 Minimization and optimization of overall data transfer connect time between handheld wireless communicating devices and remote machines 32 2000
7,123,933 System and method for remote application management of a wireless device 51 2001
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
* 5,990,867 Wireless input device and wireless input method which automatically reduces transmitted data according to data size 1 1996
* Cited By Examiner