PRIME COMPUTER, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5029111 Shared bit-plane display systemExpiredApr 29, 87Jul 02, 91[G06F]
4924378 License mangagement system and license storage keyExpiredJun 13, 88May 08, 90[H04L, G06F]
4818893 High speed switching circuitExpiredApr 06, 88Apr 04, 89[H03K]
4803306 Electromagnetic shielding clipExpiredJun 03, 87Feb 07, 89[H05K]
4675551 Digital logic bus termination using the input clamping Schottky diodes of a logic circuitExpiredMar 04, 86Jun 23, 87[H03K]
4532559 Apparatus for decoding phase encoded dataExpiredFeb 14, 83Jul 30, 85[G11B]
4506298 Method and apparatus for displaying objects on an interlaced raster scan television screenExpiredNov 09, 82Mar 19, 85[H04N]
4446412 Method and apparatus for controlling stepper motorsExpiredNov 09, 81May 01, 84[H02K]
4408874 Projection aligner with specific means for bending mirrorExpiredMay 07, 81Oct 11, 83[G03B]
4376580 Projection aligner with bending mirrorExpiredMar 02, 81Mar 15, 83[G03B]
4328553 Method and apparatus for targetless wafer alignmentExpiredSep 08, 80May 04, 82[H04N, G06F]
4265542 Apparatus and method for fine alignment of a photomask to a semiconductor waferExpiredMar 14, 79May 05, 81[G01B]
4244012 Lamp holder for projection alignerExpiredJun 29, 78Jan 06, 81[F21S]

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