Samsung Semiconductor and Telecommunications Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5089436 Method for fabricating a semiconductor device by slope etching a polysiliow layerExpiredMay 02, 90Feb 18, 92[H01L]
5067109 Data output buffer circuit for a SRAMExpiredAug 30, 88Nov 19, 91[G11C]
5025180 TTL to ECL voltage level translatorExpiredJul 05, 88Jun 18, 91[H03K]
5003357 Semiconductor light emitting deviceExpiredJan 17, 90Mar 26, 91[H01L]
4997774 Method for fabricating a DRAM cellExpiredSep 25, 89Mar 05, 91[H01L]
4978630 Fabrication method of bipolar transistorExpiredSep 26, 88Dec 18, 90[H01L]
4973834 Optical switching device employing a frequency synchronous circuitExpiredJul 01, 88Nov 27, 90[G01V]
4973976 Multiplexing parallel analog-digital converterExpiredJul 28, 88Nov 27, 90[H03M]
4965214 Method for manufacturing poly-crystal sillicon having high resistanceExpiredJul 27, 88Oct 23, 90[H01L]
4945066 Process for manufacturing a dynamic random access memory cellExpiredFeb 23, 88Jul 31, 90[H01L]
4929852 TTL to CMOS input buffer circuitExpiredJul 29, 88May 29, 90[H03K]
4920280 Back bias generatorExpiredApr 29, 88Apr 24, 90[H03L, H03K]
4920445 Junction-breakdown protection semiconductor deviceExpiredNov 17, 87Apr 24, 90[H02H]
4918029 Method for liquid-phase thin film epitaxyExpiredFeb 19, 88Apr 17, 90[H01L]
4910518 Comparator unit for a flash analog-to-digital converterExpiredJul 14, 88Mar 20, 90[H03M]
4910797 Automatic Gain control systemExpiredFeb 26, 88Mar 20, 90[H03G]
4896978 Method for optional control of line spacing in electronic typewriterExpiredJul 07, 88Jan 30, 90[B41J]
4897559 Variable clock delay circuit utilizing the R-C time constantExpiredMar 17, 88Jan 30, 90[H03K]
4894560 Dual-slope waveform generation circuitExpiredSep 16, 88Jan 16, 90[H03K]
D305119 Combination wireless handset telephone and speaker stand thereforExpiredAug 16, 88Dec 19, 89[]

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