Smith Engineering

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6019597 Process for minimizing condensibles in process streams treated by thermal oxidizersExpiredAug 19, 97Feb 01, 00[F27D]
5810581 Pre-heating of process stream for thermal oxidizersExpiredAug 20, 96Sep 22, 98[F27D]
5796387 Positioning system using infrared radiationExpiredAug 16, 94Aug 18, 98[G09G]
5779576 Throw-measuring footballExpiredAug 20, 96Jul 14, 98[A63B]
5453259 Two-bed regenerative thermal oxidizer with trap for volatile organic compoundsExpiredApr 18, 94Sep 26, 95[B01D]
5401025 Remote control system for raster scanned video displayExpiredJul 14, 94Mar 28, 95[A63F]
5365863 Regenerative thermal oxidizer with wood waste burnerExpiredJan 21, 94Nov 22, 94[F27D, F23B]
5346393 Multiple-bed thermal oxidizer control damper systemExpiredFeb 02, 93Sep 13, 94[F27D]
D348083 Video game controllerExpiredJan 06, 93Jun 21, 94[]
5277429 Game assembly utilizing sound identification for moves on a game boardExpiredFeb 05, 93Jan 11, 94[A63F]
D338690 Video gunExpiredMay 26, 92Aug 24, 93[]
5098286 Regenerative thermal incinerator apparatusExpiredMay 17, 91Mar 24, 92[F27D]
5067079 Interactive audio baseball gameExpiredFeb 06, 89Nov 19, 91[A63F, G06F]
5043646 Remote control direction selecting systemExpiredMay 01, 90Aug 27, 91[H04Q, G05D]
5026277 Regenerative thermal incinerator apparatusExpiredNov 30, 89Jun 25, 91[F27D]
4875096 Encoding of audio and digital signals in a video signalExpiredAug 20, 89Oct 17, 89[H04N]
4846693 Video based instructional and entertainment system using animated figureExpiredDec 01, 88Jul 11, 89[G09B, G09F]
4786967 Interactive video apparatus with audio and video branchingExpiredAug 20, 86Nov 22, 88[H04N]
4627090 Audio frequency multiplication deviceExpiredJul 19, 85Dec 02, 86[G10L]
4622690 Audio frequency multiplication deviceExpiredJul 19, 85Nov 11, 86[G10L]

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