STUFF TECHNOLOGY PARTNERS II, LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5088079 Carriage optics system for optical data storage systemExpiredSep 08, 89Feb 11, 92[G11B]
4982395 Composite optical grating for optical disk data storage systemsExpiredOct 03, 88Jan 01, 91[G11B]
4980882 Optical disk for detesting and distinguishing servo tracks from data tracksExpiredNov 28, 88Dec 25, 90[G11B]
4965782 Off-track bit shift compensation apparatusExpiredMay 26, 88Oct 23, 90[G11B]
4815856 Method and apparatus for measuring the absolute thickness of dust defocus layersExpiredJun 05, 86Mar 28, 89[G01B]
4815064 Differential track recordingExpiredFeb 24, 87Mar 21, 89[G11B]
4805162 Fine and coarse servo system for access and tracking on an optical diskExpiredOct 08, 86Feb 14, 89[G11B]
4791622 Optical data format employing resynchronizable data sectorsExpiredJul 20, 87Dec 13, 88[G11B]
4755977 Runout compensation for a coarse tracking servo system in an optical disk storage unitExpiredOct 14, 86Jul 05, 88[G11B]
4752922 Optical disk recording and readout system having read, write and coarse light beamsExpiredJul 06, 84Jun 21, 88[G11B]
4740941 System for aligning sector marks with data in a disk storage systemExpiredJul 06, 84Apr 26, 88[G11B]
4734906 Optical disk recording and readout system having read, write and coarse light beamsExpiredJul 06, 84Mar 29, 88[G02B, G11B]
4706235 Differential track recordingExpiredJan 25, 85Nov 10, 87[G11B]
4697167 Sync pattern encoding system for data sectors written on a storage mediumExpiredNov 21, 85Sep 29, 87[H03M]
4688204 Pulsed optical data detection systemExpiredNov 16, 84Aug 18, 87[G11B]
4686662 Subaperture coarse tracking optical system for optical data storage devicesExpiredJul 16, 84Aug 11, 87[G11B]
4682993 Fluid filter system with replaceable filter elementExpiredMay 01, 85Jul 28, 87[B01D]
4677605 Focus acquisition and maintenance for optical disk systemExpiredJul 06, 84Jun 30, 87[G11B]
4643538 Combined beam cross-section correcting, collimating and de-astigmatizing optical systemExpiredJul 06, 84Feb 17, 87[G02B]
4633391 Extended index for digital information storage and retrieval deviceExpiredOct 21, 83Dec 30, 86[G06F]

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