Cromemco Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4870605 Removable data cartridge for a computer systemExpiredJan 27, 88Sep 26, 89[G06F, H02B]
4677574 Computer graphics system with low memory enhancement circuitExpiredAug 20, 84Jun 30, 87[G09G, G06F]
D278709 Keyboard for a computer systemExpiredNov 02, 82May 07, 85[]
D277964 Disk drive unit for a computer systemExpiredNov 02, 82Mar 12, 85[]
4476467 Random entry intercomputer network with collision preventionExpiredJun 08, 82Oct 09, 84[H04Q]
4407536 Single throw multi-grip latching mechanismExpiredFeb 17, 81Oct 04, 83[E05C]
4364037 Transition data image processorExpiredJun 15, 81Dec 14, 82[G09G]
4319200 Multi-passband differentially controlled data rate synchronizerExpiredFeb 04, 80Mar 09, 82[H03L]
4317114 Composite display device for combining image data and methodExpiredMay 12, 80Feb 23, 82[G09G]
4259843 Isolation chamber for electronic devicesExpiredOct 09, 79Apr 07, 81[F25B]

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