Assignee
PORTESCAP
38 granted patents·1 pending application·520 citations·filing 1973–2018
Top patents by PatentIndex Score
39 records- 0194US4658166ASynchronous electric motor with disc-shaped permanent magnet rotorPORTESCAP·Filed 1986·Granted Apr 14, 1987·87 cites·11 claims
- 0277US4682067ASynchronous electric motor having a disc-shaped permanent magnet rotorPORTESCAP·Filed 1986·Granted Jul 21, 1987·39 cites·2 claims
- 0373US5763874AIncremental optical encoder having partially opaqued quadrature detectorsPORTESCAP·Filed 1996·Granted Jun 9, 1998·40 cites·5 claims
- 0467US4517478AElectric stepper motorPORTESCAP·Filed 1984·Granted May 14, 1985·23 cites·2 claims
- 0564US4323805ADirect current micromotorPORTESCAP·Filed 1980·Granted Apr 6, 1982·28 cites·3 claims
- 0663US4629916AMethod and apparatus for harmonics suppression in motor systemsPORTESCAP·Filed 1985·Granted Dec 16, 1986·20 cites·31 claims
- 0763US4518883AElectric motor with permanent magnet rotorPORTESCAP·Filed 1982·Granted May 21, 1985·17 cites·18 claims
- 0862US4208868AControl device for a step-by-step motorPORTESCAP·Filed 1973·Granted Jun 24, 1980·12 cites·12 claims
- 0959US5053667ADi- or polyphase synchronous electric motor with a disc-shaped rotorPORTESCAP·Filed 1989·Granted Oct 1, 1991·20 cites·5 claims
- 1058US4737753AMultipolar magnetization devicePORTESCAP·Filed 1985·Granted Apr 12, 1988·12 cites·6 claims
- 1156US4823040ASingle-stage, two-phase of four-phase synchronous electric motorPORTESCAP·Filed 1986·Granted Apr 18, 1989·19 cites·4 claims
- 1256US4714854AElectric motor with a multipolar permanent magnet rotorPORTESCAP·Filed 1986·Granted Dec 22, 1987·19 cites·6 claims
- 1356US4387312AStepping polyphased motor for a clockwork mechanismPORTESCAP·Filed 1980·Granted Jun 7, 1983·12 cites·11 claims
- 1453US4866323ASynchronous electric motor with magnetised rotor and method of manufacturing this motorPORTESCAP·Filed 1986·Granted Sep 12, 1989·14 cites·4 claims
- 1551US4516064AStepper motor control devicePORTESCAP·Filed 1983·Granted May 7, 1985·11 cites·3 claims
- 1651US4219825AElectric actuating devicePORTESCAP·Filed 1978·Granted Aug 26, 1980·7 cites·5 claims
- 1749US4415845AElectric motor control devicePORTESCAP·Filed 1981·Granted Nov 15, 1983·9 cites·2 claims
- 1848US4707677AMultipolar magnetization devicePORTESCAP·Filed 1985·Granted Nov 17, 1987·8 cites·7 claims
- 1948US4242623AMiniature electric stepping motorPORTESCAP·Filed 1979·Granted Dec 30, 1980·8 cites·6 claims
- 2046US4155018AMultipolar step motorPORTESCAP·Filed 1977·Granted May 15, 1979·9 cites·11 claims
- 2145US4082970ADirect-current motor-generatorPORTESCAP·Filed 1976·Granted Apr 4, 1978·11 cites·9 claims
- 2243US4083222AApparatus for measuring the rate of a watchPORTESCAP·Filed 1977·Granted Apr 11, 1978·8 cites·5 claims
- 2343US4060746AElectric direct current rotating machinePORTESCAP·Filed 1975·Granted Nov 29, 1977·8 cites·11 claims
- 2442US4891538ASynchronous motor with sinusodial torque variation in each phasePORTESCAP·Filed 1988·Granted Jan 2, 1990·10 cites·4 claims
- 2541US4543507ASelf-supporting rotor coil for dc-machinePORTESCAP·Filed 1981·Granted Sep 24, 1985·8 cites·1 claims
- 2641US4084502AElectric acutating devicePORTESCAP·Filed 1976·Granted Apr 18, 1978·4 cites·7 claims
- 2739US4012941AMethod of and apparatus for measuring the amplitude of oscillation of the balance of a timepiece movementPORTESCAP·Filed 1976·Granted Mar 22, 1977·7 cites·18 claims
- 2838US4908592AElectromagnetic actuating devicePORTESCAP·Filed 1987·Granted Mar 13, 1990·5 cites·10 claims
- 2938US4203281AAssembly comprising a timepiece pallet anchor and its framePORTESCAP·Filed 1978·Granted May 20, 1980·6 cites·5 claims
- 3038US4136294ADirect-current micromotorPORTESCAP·Filed 1977·Granted Jan 23, 1979·7 cites·6 claims
- 3137US5194787AControl circuit for an electric motor without a collectorPORTESCAP·Filed 1990·Granted Mar 16, 1993·8 cites·7 claims
- 3236US4337449AMagnetic transducer with a movable magnetPORTESCAP·Filed 1980·Granted Jun 29, 1982·3 cites·1 claims
- 3334US4791331ABrush assembly for electric commutator motorsPORTESCAP·Filed 1987·Granted Dec 13, 1988·7 cites·2 claims
- 3433US4079279AElectrical micromotorPORTESCAP·Filed 1975·Granted Mar 14, 1978·5 cites·3 claims
- 3532US4335596ADevice for measuring the operation of a timepiece movementPORTESCAP·Filed 1979·Granted Jun 22, 1982·5 cites·3 claims
- 3630US2019103779A1Fat stator coil for electrical motorPORTESCAP·Filed 2018·Application pending·0 cites
- 3725US5003686AMethod of manufacturing a synchronous electric motor with magnetized rotarPORTESCAP·Filed 1989·Granted Apr 2, 1991·1 cites·12 claims
- 3824US3941439AShock absorber bearing assemblyPORTESCAP·Filed 1975·Granted Mar 2, 1976·2 cites·6 claims
- 3911US4521723AMethod and device for braking an assembly comprising a two-phase synchronous motorPORTESCAP·Filed 1984·Granted Jun 4, 1985·1 cites·5 claims
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