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Bilateral communications system for distributing commerical and premium video signaling on an accountable basis
Patent #: 3934079
Issued on: 01/20/1976
Inventor: Barnhart
Converter-tuner for information transmission system
Patent #: 3935534
Issued on: 01/27/1976
Inventor: Lewis , et al.
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Emergency civil defense alarm and communications systems
Patent #: 3975583
Issued on: 08/17/1976
Inventor: Meadows
Premium interactive communication system
Patent #: 3997718
Issued on: 12/14/1976
Inventor: Ricketts , et al.
Electronic system for automatically tuning to a selected television channel
Patent #: 4020419
Issued on: 04/26/1977
Inventor: Caspari , et al.
Cable distribution system for wide-band message signals
Patent #: 4035838
Issued on: 07/12/1977
Inventor: Bassani , et al.
TV monitor
Patent #: 4044376
Issued on: 08/23/1977
Inventor: Porter
TV monitor
Patent #: 4058829
Issued on: 11/15/1977
Inventor: Thompson
Apparatus for monitoring a multichannel receiver
Patent #: 4216497
Issued on: 08/05/1980
Inventor: Ishman , et al.
CATV Converter
Patent #: 4270212
Issued on: 05/26/1981
Inventor: Furukawa
Automatic pretuning of a voltage controlled oscillator in a frequency synthesizer using successive approximation
Patent #: 4272729
Issued on: 06/09/1981
Inventor: Riley, Jr.
System for automatically substituting television signals at a head station for a cable network
Patent #: 4329675
Issued on: 05/11/1982
Inventor: Van Hulle
Panelist response scanning system
Patent #: 4331973
Issued on: 05/25/1982
Inventor: Eskin , et al.
Cable television with controlled signal substitution
Patent #: 4331974
Issued on: 05/25/1982
Inventor: Cogswell , et al.
Monitoring system and method utilizing signal injection for determining channel reception of video receivers
Patent #: 4425578
Issued on: 01/10/1984
Inventor: Haselwood , et al.
Arrangement for detecting to which channel a television set is tuned
Patent #: 4577220
Issued on: 03/18/1986
Inventor: Laxton , et al.
Audience rating measuring system
Patent #: 4622583
Issued on: 11/11/1986
Inventor: Watanabe , et al.
Preprogrammed over-the-air marketing research system
Patent #: 4630108
Issued on: 12/16/1986
Inventor: Gomersall
Receiver for RF-signals comprising a pair of parallel signal paths
Patent #: 4633315
Issued on: 12/30/1986
Inventor: Kasperkovitz
Method and apparatus for determining channel reception of a receiver
Patent #: 4723302
Issued on: 02/02/1988
Inventor: Fulmer , et al.
Signal matching signal substitution
Patent #: 4733301
Issued on: 03/22/1988
Inventor: Wright, Jr.
Zero IF radio receiver apparatus
Patent #: 4736390
Issued on: 04/05/1988
Inventor: Ward , et al.
Split band filter for cellular mobile radio
Patent #: 4783843
Issued on: 11/08/1988
Inventor: Leff , et al.
Frequency converting apparatus for converting an RF television signal to a video signal employing low IF techniques
Patent #: 4789897
Issued on: 12/06/1988
Inventor: Kappeler , et al.
Audience survey system
Patent #: 4847685
Issued on: 07/11/1989
Inventor: Gall , et al.
Method and apparatus for determining channel reception of a receiver
Patent #: 4876736
Issued on: 10/24/1989
Inventor: Kiewit
Control and metering system for pay television over a cable network
Patent #: 4878245
Issued on: 10/31/1989
Inventor: Bradley, et al.
System and methods for monitoring TV viewing system including a VCR and/or a cable converter
Patent #: 4885632
Issued on: 12/05/1989
Inventor: Mabey, et al.
Synchronous demodulation circuit for a carrier-modulated television signal
Patent #: 4929905
Issued on: 05/29/1990
Inventor: Ruitenburg
Marketing research system and method for obtaining retail data on a real time basis
Patent #: 4972504
Issued on: 11/20/1990
Inventor: Daniel, Jr., et al.
Television signal substitution
Patent #: 4974085
Issued on: 11/27/1990
Inventor: Campbell, et al.
Remote-controlled substitution of a defined program part of a TV program by a separately transmitted program part for defined, selected receivers, household terminal for executing the method and method for operating a household terminal
Patent #: 5055924
Issued on: 10/08/1991
Inventor: Skutta
Method and apparatus for providing demographically targeted television commercials
Patent #: 5155591
Issued on: 10/13/1992
Inventor: Wachob
Selection of compressed television signals from single channel allocation based on viewer characteristics Patent #: 5231494
Issued on: 07/27/1993
Inventor: Wachob
December 30, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
