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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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 CABLE, A DIVISION OF TIME WARNER ENTERTAINMENT COMPANY, L.P.STAMFORD, CT39
TIME WARNER CABLE ENTERPRISES LLCNEW YORK, NY362
TIME WARNER ENTERTAINMENT COMPANY, L.P., D/B/A TIME WARNER CABLESTAMFORD, CT12

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Williamson, Louis D Denver, CO 26 273

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ARRIS INTERNATIONAL, INC. (1)
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MTV NETWORKS NETWORKS ON CAMPUS INC. (1)
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MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. (1)
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Zenith Electronics Corporation (1)
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ANTEC CORPORATION (1)
* 5,426,699 Method and apparatus for digitizing a scrambled analog video signal 69 1993
 
ACTIVEVIDEO NETWORKS, INC. (4)
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Broadband Technologies, Inc. (1)
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NEC CORPORATION (1)
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Nippon Carbide Kogyo Kabushiki Kaisha (1)
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Texscan Corporation (1)
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HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
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AT&T IPM CORP. (2)
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LSI LOGIC CORPORATION (1)
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NORTON GARFINKLE (1)
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CILSTAR RESEARCH LLC (2)
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GTE LABORATORIES INCORPORATED (1)
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* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
COX COMMUNICATIONS, INC. (2)
8,493,986 Service gateways for providing broadband communication 2 2010
* 9,054,888 Systems and methods for providing broadband communication 0 2011
 
CISCO TECHNOLOGY, INC. (1)
* 6,348,837 Bi-directional amplifier having a single gain block for amplifying both forward and reverse signals 32 2000
 
CIENA CORPORATION (8)
7,146,630 Broadband system with intelligent network devices 23 2001
7,139,247 Broadband system with topology discovery 21 2001
7,072,360 Network architecture for intelligent network elements 21 2001
7,027,394 Broadband system with traffic policing and transmission scheduling 27 2001
6,948,000 System and method for mapping end user identifiers to access device identifiers 15 2001
* 2002/0078,464 Broadband system with intelligent network devices 10 2001
7,835,379 Network architecture for intelligent network elements 3 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 14 2001
7,138,886 Wideband CATV signal splitter device 17 2002
* 7,748,023 Device, system and method for connecting a subscriber device to a wideband distribution network 23 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
 
NARAD NETWORKS, INC. (2)
* 2002/0075,805 Broadband system with QOS based packet handling 52 2001
* 2002/0075,875 Broadband system with transmission scheduling and flow control 26 2001
* Cited By Examiner