Inventor · disambiguated record
Franz Spirk
Also filed as: SPIRK FRANZ
13 granted patents·204 citations·filing 1974–1991
92Inventor score
Files withSIEMENS AG13
Top patents by PatentIndex Score
13 records- 0193US4367890ATurbine set with a generator feeding a network of constant frequencySIEMENS AG·Filed 1981·Granted Jan 11, 1983·68 cites·11 claims
- 0287US4672252AElectrical machine with a stator lamination of grain-oriented sheetsSIEMENS AG·Filed 1981·Granted Jun 9, 1987·49 cites·2 claims
- 0355US4621211AElectrical machine brushes and sliprings with brush dust collecting apparatusSIEMENS AG·Filed 1985·Granted Nov 4, 1986·18 cites·14 claims
- 0445US4283648ASynchronous electric machine with salient poles in the rotorSIEMENS AG·Filed 1979·Granted Aug 11, 1981·9 cites·5 claims
- 0543US4338537ASynchronous turbine type electric motorSIEMENS AG·Filed 1978·Granted Jul 6, 1982·8 cites·2 claims
- 0643US4322645ALiquid-cooled electric machineSIEMENS AG·Filed 1980·Granted Mar 30, 1982·10 cites·11 claims
- 0743US3935490ASupporting arrangement for the rotor of a vertical electric machine such as hydraulic generator or the likeSIEMENS AG·Filed 1975·Granted Jan 27, 1976·9 cites·7 claims
- 0841US4211946AAsynchronous electric machineSIEMENS AG·Filed 1978·Granted Jul 8, 1980·7 cites·4 claims
- 0941US4149100AExcitation winding arrangement for a synchronous electric machine having a rotor with salient polesSIEMENS AG·Filed 1976·Granted Apr 10, 1979·7 cites·3 claims
- 1038US5196751ALarge-diameter a.c. motor with joints in the statorSIEMENS AG·Filed 1991·Granted Mar 23, 1993·9 cites·7 claims
- 1138US3935488AMethod of operating a fluid-cooled hydropower generatorSIEMENS AG·Filed 1974·Granted Jan 27, 1976·4 cites·2 claims
- 1231US4277709ALarge diameter synchronous electric machineSIEMENS AG·Filed 1979·Granted Jul 7, 1981·2 cites·3 claims
- 1331US4070593AExcitation winding arrangement for a synchronous electric machineSIEMENS AG·Filed 1976·Granted Jan 24, 1978·4 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Franz Spirk files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →