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Inventor

John A. Ritchie, Jr.

Inventor
Duluth, GA, US

Overview

20→
Patents
1984–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 20 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Nprimary
H04NPictorial communication, e.g. television23%
H04LTransmission of digital information, e.g. telegraphic communication21%
H04JMultiplex communication15%
H04BTransmission12%
H04HBroadcast communication6%
H04MTelephonic communication6%
H04QSelecting6%
H02BBoards, substations or switching arrangements for the supply or distribution of electric power2%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines2%
H02JElectric power networks2%
PatentTitleYear
10,938,478Reducing dynamic power in cable access networks202110,880,008Downstream node setup202010,784,664Three-piece electronics enclosure202010,771,269Automated intelligent node for hybrid fiber-coaxial (HFC) networks202010,594,399Downstream node setup202010,523,270Full duplex (FDX) enhanced node201910,187,149Downstream node setup20198,363,679'Clock synchronization in a bidirectional network'20138,310,600'Supplying broadband HRC networks with non-harmonically related carriers'20127,933,288'Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service'20117,801,119'Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service'20107,519,081'Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service in local networks'20097,336,680'Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service'20087,218,901'Automatic frequency control of multiple channels'20076,995,806'Amplifier with a universal automatic gain control circuit'20065,790,523'Testing facility for a broadband communications system'19985,594,726'Frequency agile broadband communications system'19975,499,241'Broadband communications system'19964,590,709'Door support for a battery storage cabinet or the like'19864,467,266'Battery overcharge protection system'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Based in Morris Township, Morris County, NJ, US· patent location history
1986Based in Lake Hopatcong, NJ, US· patent location history
1996–2008Patents assigned to SCIENTIFIC ATLANTA (6)· patent assignee history
1996–2021Based in Duluth, GA, US· patent location history
2009–2021Patents assigned to CISCO TECH INC (8)· patent assignee history
2011–2013Patents assigned to AO JIENING (2)· patent assignee history
2011–2013Patents assigned to BLASHEWSKI STEVEN E (2)· patent assignee history
2011–2013Patents assigned to BRICKELL JOHN W (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CISCO TECH INC82009–2021
SCIENTIFIC ATLANTA61996–2008
AO JIENING22011–2013
BLASHEWSKI STEVEN E22011–2013
BRICKELL JOHN W22011–2013
Locations
LocationPatentsSpan
Duluth, Georgia, US181996–2021
Lake Hopatcong, New Jersey, US11986
Morris Township, Morris County, New Jersey, US11984