Takeda Riken Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4760924 IC test equipment having input magazine replenisherExpiredJun 02, 87Aug 02, 88[B07C, B65G]
4715501 IC test equipmentExpiredJun 27, 85Dec 29, 87[B07C, B65G]
4691831 IC test equipmentExpiredJun 21, 85Sep 08, 87[B07C]
4620147 Signal detectorExpiredFeb 16, 84Oct 28, 86[G01R]
4602220 Variable frequency synthesizer with reduced phase noiseExpiredAug 14, 85Jul 22, 86[H03L]
4586181 Test pattern generating apparatusExpiredNov 14, 83Apr 29, 86[G01R]
4584683 Logic circuit test systemExpiredNov 22, 83Apr 22, 86[G01R]
4583041 Logic circuit test systemExpiredMay 31, 84Apr 15, 86[G06F, G01R]
4574271 Multi-slope analog-to-digital converterExpiredNov 09, 82Mar 04, 86[H03K]
4573120 I/O Control system for data transmission and reception between central processor and I/O unitsExpiredNov 01, 83Feb 25, 86[G06F]
4559521 Calibration of a multi-slope A-D converterExpiredDec 03, 82Dec 17, 85[H03K]
4555663 Test pattern generating apparatusExpiredNov 16, 83Nov 26, 85[G06F, G01R]
4553100 Counter-address memory for multi-channel timing signalsExpiredJun 07, 83Nov 12, 85[H03L]
4539518 Signal generator for digital spectrum analyzerExpiredSep 19, 83Sep 03, 85[G01R]
4523288 Interval-expanding timerExpiredMar 10, 82Jun 11, 85[G04F]
4523312 IC testerExpiredOct 21, 82Jun 11, 85[G06F, G01R]
4513256 Swept frequency signal generatorExpiredJun 29, 83Apr 23, 85[H03L, H03B]
4504749 Delay pulse generating circuitExpiredJul 20, 82Mar 12, 85[H03K]
4497056 IC TesterExpiredAug 13, 82Jan 29, 85[G01R]
4495621 Glitch detecting and measuring apparatusExpiredDec 17, 82Jan 22, 85[G01R]

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