Kabushiki Kaisha CSK

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5261075 Optical recording medium access systemExpiredJul 02, 92Nov 09, 93[G06F]
5212602 Magnetic head having fuse within head caseExpiredMay 17, 91May 18, 93[G11B]
5198646 System for detecting punched holes of magnetic cardsExpiredDec 18, 91Mar 30, 93[G06K]
5187698 Data reading apparatus for identifying position of data tracksExpiredMay 17, 90Feb 16, 93[E11B]
5182737 System for reading optical recording medium using reference liners which are positioned perpendicular to data tracksExpiredMay 17, 90Jan 26, 93[G11B]
5181194 Writing device for optical memory cardExpiredNov 14, 89Jan 19, 93[G11B]
5164577 Optical recording medium with region for identifying defective written dataExpiredOct 02, 90Nov 17, 92[G11B, G06K]
5142519 Optical recording medium and device for writing and reading information in and from the recording mediumExpiredAug 13, 90Aug 25, 92[G11B]
5142524 Optical recording mediumExpiredMay 03, 89Aug 25, 92[G11B]
5138597 Apparatus for detecting a read error of an optical recording mediumExpiredNov 14, 89Aug 11, 92[G11B]
5136503 Machine translation systemExpiredDec 19, 89Aug 04, 92[G06F]
5136588 Interleaving method and apparatusExpiredNov 14, 89Aug 04, 92[H03M]
5128917 Tracking device for optical memory cardExpiredOct 13, 89Jul 07, 92[G11B]
5113378 Optical tracking system for an optical recording arrangement with plurality of beamsExpiredJan 02, 90May 12, 92[G11B]
5070491 Error signal generating circuitExpiredApr 21, 89Dec 03, 91[G11B]
5067812 Systems for inspecting defects in an optical recording mediumExpiredJan 23, 90Nov 26, 91[G01N]
5053610 Reading apparatus and photodetector for optical recording mediumExpiredFeb 10, 89Oct 01, 91[H01L, G11B]
5050171 Burst error correction apparatusExpiredNov 13, 89Sep 17, 91[G06F]

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