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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5362209 Proportional solenoid actuator and pump system including sameExpiredMay 23, 91Nov 08, 94[F02M, F04B]
5201295 High pressure fuel injection systemExpiredApr 17, 91Apr 13, 93[F02M]
5138291 Proportional solenoid actuatorExpiredApr 10, 91Aug 11, 92[H01H]
5056469 Fuel injection systemExpiredJun 29, 90Oct 15, 91[F02D]
5026462 Method and apparatus for electrochemical machining of spray holes in fuel injection nozzlesExpiredMar 06, 90Jun 25, 91[B23H]
4948049 Rate control in accumulator type fuel injectorsExpiredFeb 24, 89Aug 14, 90[F02M]
4889092 Fuel viscosity/density compensation deviceExpiredJul 18, 85Dec 26, 89[F02M]
4879985 Timing and speed sensor for fuel injection pumpExpiredMar 22, 88Nov 14, 89[F02M]
4850321 Preloaded compliant linkage for fuel injection pump rackExpiredOct 16, 87Jul 25, 89[F02M]
4838232 Fuel delivery control systemExpiredNov 30, 87Jun 13, 89[F02M]
4831983 Stepper motor control for fuel injectionExpiredOct 16, 87May 23, 89[F02M]
4711397 Electromagnetic fuel injector having continuous flow pathExpiredJan 11, 82Dec 08, 87[F02M]
4660770 Electromagnetic fuel injectorExpiredSep 25, 85Apr 28, 87[F16K, B05B, F02M, F16F]
4658794 Fuel injection controlExpiredNov 07, 85Apr 21, 87[F02M]
4655396 Electromagnetic fuel injectorExpiredSep 25, 85Apr 07, 87[F16K, F02M, B05B]
4651562 SOC signal analysisExpiredMar 26, 86Mar 24, 87[G01M]
4601270 Method and apparatus for torque control of an internal combustion engine as a function of exhaust smoke levelExpiredDec 27, 83Jul 22, 86[F02M]
4586656 Solenoid valve, particularly as bypass valve with fuel injectorExpiredAug 14, 84May 06, 86[F16K, F02M]
4529165 Solenoid valveExpiredAug 14, 84Jul 16, 85[F16K]
4526154 Timing control mechanism for a fuel injection pumpExpiredDec 27, 82Jul 02, 85[F02M, F02D]

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