SUPERTEX, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6169391 Device for converting high voltage alternating current to low voltage direct currentExpiredJul 12, 99Jan 02, 01[G05F]
5171705 Self-aligned structure and process for DMOS transistorExpiredNov 22, 91Dec 15, 92[H01L]
4937477 Integrated mos high-voltage level-translation circuit, structure and methodExpiredJan 19, 88Jun 26, 90[H03K]
4458262 CMOS Device with ion-implanted channel-stop region and fabrication method thereforExpiredMay 27, 80Jul 03, 84[H01L]
4453235 Integrated memory circuitsExpiredSep 30, 82Jun 05, 84[G11C]
4404477 Detection circuit and structure thereforExpiredNov 13, 79Sep 13, 83[H03K, G05F]
4402003 Composite MOS/bipolar power deviceExpiredJan 12, 81Aug 30, 83[H01L]
4398339 Fabrication method for high power MOS deviceExpiredSep 09, 81Aug 16, 83[H01L]
4393391 Power MOS transistor with a plurality of longitudinal grooves to increase channel conducting areaExpiredJun 16, 80Jul 12, 83[H01L]
4345265 MOS Power transistor with improved high-voltage capabilityExpiredApr 14, 80Aug 17, 82[H01L]
4344002 Detection circuit and structure thereforExpiredNov 13, 79Aug 10, 82[H03K]
4344081 Combined DMOS and a vertical bipolar transistor device and fabrication method thereforExpiredApr 14, 80Aug 10, 82[H01L]
4277782 Detection circuit and structure thereforExpiredNov 13, 79Jul 07, 81[G08B]
4215281 Detection circuit and structure thereforExpiredFeb 22, 78Jul 29, 80[H03K]

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