Video Research Limited
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- May 14, 2002 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 472 Total Citation Count
- Apr 20, 1984 Earliest Filing
- 6 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
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Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4905080 Apparatus for collecting television channel data and market research dataExpiredJun 01, 88Feb 27, 90[H04H]
4792864 Apparatus for detecting recorded data in a video tape recorder for audience rating purposesExpiredJun 27, 86Dec 20, 88[H04N]
4574304 Audience rating measuring system for television and video tape recorderExpiredApr 20, 84Mar 04, 86[H04N]
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