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http://www.google.com/patents/US3230302?utm_source=gb-gplus-share
Patent US3230302 - TELEVISION PROGRAM DISTRIBUTION AND METERING SYSTEM
TELEVISION PROGRAM DISTRIBUTION AND METERING SYSTEM
George Bruck et al
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Abstract
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Description
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Patent number
: 3230302
Filing date
: Feb 13, 1959
Issue date
: Jan 18, 1966
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