XEBEC

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4870332 Voltage-boosting motor controllerExpiredJul 08, 88Sep 26, 89[H02K]
4816938 Process for determining data disk track centersExpiredJul 24, 87Mar 28, 89[G11B]
4717982 Electrical connector retaining assembly for facilitating removable mounting of a rigid disk driveExpiredSep 15, 86Jan 05, 88[G11B]
4703371 Disk drive formattingExpiredMar 04, 85Oct 27, 87[G11B]
4602197 Stepping motor control systemExpiredJan 14, 85Jul 22, 86[H02P]
4563713 Method and apparatus for positioning and indexing read/write on a multiple track recording mediumExpiredJul 09, 82Jan 07, 86[G11B]
4399476 Suspension assembly for magnetic headExpiredApr 13, 81Aug 16, 83[G11B]

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