Inventor · disambiguated record
John A. Ritchie, Jr.
Also filed as: RITCHIE JOHN A · RITCHIE JR JOHN A · RITCHIE JR JOHN ALEXANDER
20 granted patents·2 pending applications·1,128 citations·filing 1982–2020
95Inventor score
Top patents by PatentIndex Score
22 records- 0197US5594726AFrequency agile broadband communications systemSCIENTIFIC ATLANTA·Filed 1994·Granted Jan 14, 1997·403 cites·113 claims
- 0295US5499241ABroadband communications systemSCIENTIFIC ATLANTA·Filed 1993·Granted Mar 12, 1996·267 cites·32 claims
- 0392US7218901B1Automatic frequency control of multiple channelsSCIENTIFIC ATLANTA·Filed 2002·Granted May 15, 2007·93 cites·18 claims
- 0491US8363679B2Clock synchronization in a bidirectional networkSORENSON DONALD C·Filed 2009·Granted Jan 29, 2013·34 cites·17 claims
- 0591US7336680B2Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital serviceSCIENTIFIC ATLANTA·Filed 2002·Granted Feb 26, 2008·45 cites·12 claims
- 0688US5790523ATesting facility for a broadband communications systemSCIENTIFIC ATLANTA·Filed 1996·Granted Aug 4, 1998·201 cites·34 claims
- 0785US10880008B2Downstream node setupCISCO TECH INC·Filed 2020·Granted Dec 29, 2020·2 cites·17 claims
- 0885US7801119B2Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital serviceSCIENT ATLANTA LLC·Filed 2007·Granted Sep 21, 2010·7 cites·19 claims
- 0980US10784664B2Three-piece electronics enclosureCISCO TECH INC·Filed 2018·Granted Sep 22, 2020·3 cites·20 claims
- 1077US10594399B2Downstream node setupCISCO TECH INC·Filed 2019·Granted Mar 17, 2020·2 cites·16 claims
- 1173US4590709ADoor support for a battery storage cabinet or the likeCOOPER IND INC·Filed 1984·Granted May 27, 1986·28 cites·12 claims
- 1270US10523270B1Full duplex (FDX) enhanced nodeCISCO TECH INC·Filed 2018·Granted Dec 31, 2019·2 cites·20 claims
- 1368US7519081B2Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service in local networksCISCO TECH INC·Filed 2002·Granted Apr 14, 2009·12 cites·28 claims
- 1464US8310600B2Supplying broadband HRC networks with non-harmonically related carriersRITCHIE JR JOHN ALEXANDER·Filed 2009·Granted Nov 13, 2012·2 cites·19 claims
- 1562US6995806B1Amplifier with a universal automatic gain control circuitSCIENTIFIC ATLANTA·Filed 2000·Granted Feb 7, 2006·6 cites·16 claims
- 1655US4467266ABattery overcharge protection systemMC GRAW EDISON CO·Filed 1982·Granted Aug 21, 1984·21 cites·14 claims
- 1752US10938478B2Reducing dynamic power in cable access networksCISCO TECH INC·Filed 2019·Granted Mar 2, 2021·0 cites·20 claims
- 1852US10187149B2Downstream node setupCISCO TECH INC·Filed 2017·Granted Jan 22, 2019·0 cites·14 claims
- 1950US7933288B2Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital serviceSORENSON DONALD C·Filed 2007·Granted Apr 26, 2011·0 cites·14 claims
- 2044US10771269B2Automated intelligent node for hybrid fiber-coaxial (HFC) networksCISCO TECH INC·Filed 2018·Granted Sep 8, 2020·0 cites·20 claims
- 2143US2003053493A1Allocation of bit streams for communication over-multi-carrier frequency-division multiplexing (FDM)Filed 2002·Application pending·0 cites
- 2243US2003058890A1MPEG program clock reference (PCR) delivery for support of accurate network clocksFiled 2002·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when John A. Ritchie, Jr. files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →