Inventor

Richard G. Merrell

Inventor

Darien, IL, US

Overview

18→

Patents

1976–1993

Patent span

Electricity

Primary field (CPC H)

Patents· 18 as inventor

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

H03Jprimary

H03JTuning resonant circuits38%

H04NPictorial communication, e.g. television38%

H03KPulse technique10%

E05FDevices for moving wings into open or closed position5%

E05YIndexing scheme associated with subclasses e05d and e05f, relating to construction elements, electric control, power supply, power signal or transmission, user interfaces, mounting or coupling, details, accessories, auxiliary operations not otherwise provided for, application thereof5%

G08BSignalling systems, e.g. personal calling systems5%

PatentTitleYear

5,231,665'Cable television system having dynamic market code shuffling'1993 4,521,897'Apparatus for synchronizing the operation of master and slave counters'1985 4,514,761'Data encryption technique for subscription television system'1985 4,503,462'Automatic homing system for a subscription television signal decoder'1985 4,476,488'Control circuit for CATV alert system'1984 4,425,579'Catv converter with keylock to favorite channels'1984 4,336,553'Method of coding audio and video signals'1982 4,323,922'Television coding system with channel level identification'1982 4,160,993'VIR line recognition system'1979 4,156,197'High speed phase locked loop tuning system'1979 4,156,199'Apparatus for shifting a tuning window'1979 4,151,559'Electronic television tuner interface circuit'1979 4,090,143'Digital phase comparator with reset'1978 4,070,629'High speed tuning system'1978 4,035,702'Electronic garage door opener safety device'1977 4,021,741'Remote control with reduced responsiveness to interrupted actuating signals'1977 4,002,985'Channel selection indicator for memory tuning system'1977 3,943,449'Multi-speed ramp for a varactor tuning system'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1979Patents assigned to ZENITH RADIO CORP (9)· patent assignee history

1976–1979Based in Darien, IL, US· patent location history

1977Patents assigned to PETTERSEN MALVIN P (1)· patent assignee history

1982–1984Patents assigned to OAK INDUSTRIES INC (2)· patent assignee history

1982Patents assigned to OAK IND (1)· patent assignee history

1982–1993Based in Hebron, IL, US· patent location history

1984–1993Patents assigned to ZENITH ELECTRONICS CORP (5)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
ZENITH RADIO CORP	9	1976–1979
ZENITH ELECTRONICS CORP	5	1984–1993
OAK INDUSTRIES INC	2	1982–1984
OAK IND	1	1982
PETTERSEN MALVIN P	1	1977

Locations

Location	Patents	Span
Darien, Illinois, US	10	1976–1979
Hebron, Illinois, US	8	1982–1993