Advanced Television Test Center, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5841480 Film to video format converter using least significant look-up tableExpiredNov 06, 95Nov 24, 98[H04N]
5784113 Unidirectional format converterExpiredJun 07, 95Jul 21, 98[H04N]
5729296 Bi-directional television format digital signal converter with improved luminance signal-to-noise ratio which changes the number of bits per byteExpiredJun 07, 95Mar 17, 98[H04N]
5647050 Format signal converter using dummy samplesExpiredJan 30, 95Jul 08, 97[H04N]
5617218 Bi-directional television and motion picture film to magnetic tape format digital signal converterExpiredMay 06, 93Apr 01, 97[H04N]
5574506 Bi-directional television format digital signal converter with improved luminance signal-to-noise ratioExpiredJun 07, 95Nov 12, 96[H04N]
5570088 Format signal converter using dummy samplesExpiredNov 24, 93Oct 29, 96[H04N]
5504532 Bi-directional television format digital signal converter with improved luminance signal-to-noise ratioExpiredApr 28, 93Apr 02, 96[H04N]
5493413 Multiple HDTV format digital signal converter for converting an HDTV format to a format recordable on a digital video recorder/playerExpiredFeb 21, 95Feb 20, 96[H04N, G11B]
5442460 Unidirectional format signal converterExpiredNov 24, 93Aug 15, 95[H04N]
5280397 Bi-directional HDTV format digital signal converterExpiredSep 07, 89Jan 18, 94[H04N]

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