Tosbac Computer System Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4958151 Display control circuitExpiredAug 28, 85Sep 18, 90[G09G]
4873670 Complementary semiconductor memory device with pull-up and pull downExpiredJun 13, 86Oct 10, 89[G11C]
4791321 CMOS output circuit deviceExpiredJul 23, 86Dec 13, 88[H03K]
4701748 Key circuitExpiredSep 26, 86Oct 20, 87[G06F]
4697101 Read/write control circuitExpiredAug 29, 84Sep 29, 87[H03K, G06F]
4692834 Electrostatic discharge protection circuit with variable limiting threshold for MOS deviceExpiredAug 02, 85Sep 08, 87[H02H]
4626795 Differential amplifierExpiredSep 06, 85Dec 02, 86[H03F]

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