Inventor
Melvin C. Hendrickson
Inventor
Elmhurst, IL, US
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Nprimary
H04NPictorial communication, e.g. television33%
H03JTuning resonant circuits28%
G08CTransmission systems for measured values, control or similar signals11%
H04BTransmission11%
H04LTransmission of digital information, e.g. telegraphic communication11%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses6%
PatentTitleYear
4,759,061'Technique for toggling coding mode in a television signal encoder'19884,598,313'Television signal scrambling system'19864,558,360'Decoder lockout defeat circuit'19854,460,922'Memory select system for an STV decoder'19844,425,647'IR Remote control system'19844,408,225'Subscription television decoder'19834,377,006'IR Remote control system'19834,317,228'Television receiver having multiplexed phase lock loop tuning system'19824,292,650'Stv Subscriber address system'19814,156,199'Apparatus for shifting a tuning window'19794,081,771'82 Detent manual varactor tuning system'19783,943,449'Multi-speed ramp for a varactor tuning system'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1984Patents assigned to ZENITH RADIO CORP (8)· patent assignee history
1976–1988Based in Elmhurst, IL, US· patent location history
1984–1988Patents assigned to ZENITH ELECTRONICS CORP (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ZENITH RADIO CORP | 8 | 1976–1984 |
| ZENITH ELECTRONICS CORP | 4 | 1984–1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Elmhurst, Illinois, US | 12 | 1976–1988 |