US Patent No: 5,774,458

Number of patents in Portfolio can not be more than 2000

Multiplex amplifiers for two-way communications in a full-service network

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention is a novel apparatus for amplifying upstream and downstream signals, the signals comprising different portions of a communications spectrum and wherein at least two portions require amplification in opposing upstream and downstream directions. The apparatus comprises: an upstream port wherein upstream signals are input into the apparatus; a downstream port wherein downstream signals are input into the apparatus; a first stage connected to the upstream and the downstream ports, the first stage filtering out a first portion of the spectrum and passing the first portion between the upstream and downstream ports, the first stage comprising a first pair of first stage filters for filtering the first portion from the upstream and the downstream signals and a second pair of first stage filters for passing the remaining spectrum; a second stage connected to the second pair of first stage filters, the second stage filtering out a second and a third portion from the remaining spectrum; the second stage comprising a first pair of second stage filters for filtering the second portion and a second pair of second stage filters for filtering the third portion; wherein the first stage and the second stage are substantially electrically isolated.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TIME WARNER CABLESTAMFORD, CT38
TIME WARNER ENTERTAINMENT COMPANY, L.P., D/B/A TIME WARNER CABLESTAMFORD, CT13

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Williamson, Louis D Denver, CO 38 538

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ACTIVEVIDEO NETWORKS, INC. (4)
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* 5,361,091 Interactive home information system for distributing video picture information to television viewers over a fiber optic telephone system 187 1992
* 5,442,700 Scrambling method 51 1994
 
AT&T IPM CORP. (2)
* 5,452,297 Access switches for large ATM networks 234 1993
* 5,455,701 Packet switching apparatus using pipeline controller 44 1994
 
CILSTAR RESEARCH LLC (2)
* 5,311,423 Schedule management method 189 1991
* 5,383,112 Inventory management method 69 1991
 
SCIENTIFIC-ATLANTA, INC. (2)
* 5,390,337 Combination surge and diplex filter for CATV distribution systems 31 1992
* 5,357,276 Method of providing video on demand with VCR like functions 691 1992
 
SOUND VIEW INNOVATIONS, LLC (2)
* 5,453,979 Method and apparatus for generating route information for asynchronous transfer mode cell processing 56 1994
* 5,459,722 Asynchronous transfer mode (ATM) transport of voice-band signals 92 1994
 
VERIZON LABORATORIES INC. (2)
* 4,991,208 Video control system having session encryption key 68 1990
* 5,168,353 Video distribution system allowing viewer access to time staggered indentical prerecorded programs 157 1990
 
ANTEC CORPORATION (1)
* 5,426,699 Method and apparatus for digitizing a scrambled analog video signal 56 1993
 
ARRIS INTERNATIONAL, INC. (1)
* 5,425,027 Wide area fiber and TV cable fast packet cell network 159 1993
 
Broadband Technologies, Inc. (1)
* 4,530,008 Secured communications system 116 1984
 
CISCO TECHNOLOGY, INC. (1)
* 5,394,394 Message header classifier 126 1993
 
DETA TECHNOLOGY DEVELOPMENT LLC (1)
* 5,421,031 Program transmission optimisation 125 1993
 
ERICSSON GE MOBILE COMMUNICATIONS INC. (1)
* 5,327,580 Full duplex RF repeater/base station providing microprocessor-controlled simultaneous CTCSS tone encode/decode 13 1993
 
GTE LABORATORIES INCORPORATED (1)
* 5,046,090 Recorded medium for video control system 104 1990
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
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INTELETEXT SYSTEMS, INC. (1)
* 5,412,720 Interactive home information system 319 1992
 
INTERACTIVE NETWORKS, INC. (1)
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LSI LOGIC CORPORATION (1)
* 5,446,726 Error detection and correction apparatus for an asynchronous transfer mode (ATM) network device 116 1993
 
MACROVISION CORPORATION (1)
* 4,506,387 Programming-on-demand cable system and method 403 1983
 
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. (1)
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MOTOROLA, INC. (1)
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MTV NETWORKS NETWORKS ON CAMPUS INC. (1)
* 5,423,555 Interactive television and video game system 56 1993
 
NEC CORPORATION (1)
* 5,455,820 Output-buffer switch for asynchronous transfer mode 108 1994
 
NIPPON CARBIDE KOGYO KABUSHIKI KAISHA (1)
* 5,225,267 Laminated resin film having a metallic appearance 21 1991
 
NORTON GARFINKLE (1)
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Texscan Corporation (1)
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Zenith Electronics Corporation (1)
* 4,553,161 Upstream data packet time slot synchronization with downstream VBI for two-way CATV system 72 1984
 
Zing Systems, L.P. (1)
* 5,343,239 Transaction based interactive television system 404 1991
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CIENA CORPORATION (7)
7,146,630 Broadband system with intelligent network devices 18 2001
7,139,247 Broadband system with topology discovery 20 2001
7,072,360 Network architecture for intelligent network elements 20 2001
7,027,394 Broadband system with traffic policing and transmission scheduling 26 2001
6,948,000 System and method for mapping end user identifiers to access device identifiers 14 2001
7,835,379 Network architecture for intelligent network elements 1 2005
8,184,643 Device, system, and method for transporting data using combined broadband and legacy network infrastructures 0 2005
 
XTEND NETWORKS LTD. (6)
7,716,711 Television multiplexing and transmission system and method 0 2000
7,209,497 System and method for spectral node splitting in a hybrid fiber optic-coaxial cable network 13 2001
7,138,886 Wideband CATV signal splitter device 15 2002
* 7,748,023 Device, system and method for connecting a subscriber device to a wideband distribution network 17 2005
7,616,890 System, device and method of expanding the operational bandwidth of a communication infrastructure 2 2005
* 7,904,932 Wideband node in a CATV network 1 2008
 
COX COMMUNICATIONS, INC. (1)
8,493,986 Service gateways for providing broadband communication 1 2010
 
SCIENTIFIC-ATLANTA, INC. (1)
* 6,348,837 Bi-directional amplifier having a single gain block for amplifying both forward and reverse signals 30 2000
* Cited By Examiner