Sanwa Seiki Mfg. Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4644475 Method of controlling actuator by applying driving pulseExpiredJan 04, 85Feb 17, 87[F02D]
4558679 Method of controlling hydraulic actuatorExpiredNov 03, 81Dec 17, 85[F02M]
4535402 Digital control methodExpiredDec 18, 81Aug 13, 85[G05B]
4527531 Method of detecting fuel injection timingExpiredFeb 08, 82Jul 09, 85[F02M]
4455867 Method of detecting control error in digital controlExpiredNov 03, 81Jun 26, 84[G01M]
4397178 Fuel economy running indicatorExpiredMay 05, 81Aug 09, 83[G01M]
4305366 Injection timing control system for fuel-injection pump for engineExpiredAug 29, 79Dec 15, 81[F02M]
4305367 Injection timing control system for fuel-injection pump for engineExpiredAug 29, 79Dec 15, 81[F02M]

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