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http://www.google.ca/patents/US3721757?utm_source=gb-gplus-share
Patent US3721757 - METHOD AND APPARATUS FOR AUTOMATICALLY EDITING. TELEVISION INFORMATION
METHOD AND APPARATUS FOR AUTOMATICALLY EDITING. TELEVISION INFORMATION
A. B. ETTLINGER et al
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Abstract
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Description
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Patent number
: 3721757
Filing date
: 8 Feb 1971
Issue date
: 20 Mar 1973
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