Inventor · disambiguated record
Frederick A. Stich
Also filed as: STICH FREDERICK A · STICH FREDERICK ALAN
30 granted patents·1 pending application·2,458 citations·filing 1974–2016
98Inventor score
Files withSIEMENS ALLIS INC9ALLIS CHALMERS8BEST POWER TECH INC5GEN SIGNAL CORP2SIEMENS ENERGY & AUTOMAT2
Top patents by PatentIndex Score
31 records- 0198US5602462AUninterruptible power systemBEST POWER TECH INC·Filed 1995·Granted Feb 11, 1997·636 cites·51 claims
- 0298US3967173ATransistor bridge inverter motor drive having reduced harmonicsALLIS CHALMERS·Filed 1975·Granted Jun 29, 1976·109 cites·29 claims
- 0397US3971972ATransistor inverter motor drive having voltage boost at low speedsALLIS CHALMERS·Filed 1975·Granted Jul 27, 1976·65 cites·32 claims
- 0496US5790391AStandby power systemGEN SIGNAL CORP·Filed 1996·Granted Aug 4, 1998·211 cites·35 claims
- 0595US5295078AMethod and apparatus for determination of battery run-time in uninterruptible power systemBEST POWER TECHNOLOGY CORP·Filed 1992·Granted Mar 15, 1994·320 cites·34 claims
- 0694US5315533ABack-up uninterruptible power systemBEST POWER TECH INC·Filed 1991·Granted May 24, 1994·272 cites·48 claims
- 0793US5229651AMethod and apparatus for line power monitoring for uninterruptible power suppliesBEST POWER TECH INC·Filed 1989·Granted Jul 20, 1993·84 cites·42 claims
- 0892US4123692AAdjustable speed electric motor drive having constant harmonic contentALLIS CHALMERS·Filed 1976·Granted Oct 31, 1978·51 cites·29 claims
- 0991US6266260B1Inverter having center switch and uninterruptible power supply implementing samePOWERWARE CORP·Filed 2000·Granted Jul 24, 2001·81 cites·35 claims
- 1091US4423459ASolid state circuit protection system and methodSIEMENS ALLIS INC·Filed 1982·Granted Dec 27, 1983·69 cites·11 claims
- 1190US4128793APower circuit for variable frequency, variable magnitude power conditioning systemALLIS CHALMERS·Filed 1977·Granted Dec 5, 1978·37 cites·16 claims
- 1287US5729120ADynamic voltage regulation stabilization for AC power supply systemsGEN SIGNAL CORP·Filed 1996·Granted Mar 17, 1998·55 cites·32 claims
- 1387US3931553AElectronic commutation system having motor stator windings in push-pullALLIS CHALMERS·Filed 1974·Granted Jan 6, 1976·39 cites·5 claims
- 1486US4622513AGating of the thyristors in an arcless tap changing regulatorSIEMENS ENERGY & AUTOMAT·Filed 1984·Granted Nov 11, 1986·45 cites·4 claims
- 1583US4659973ABrushless exciter for controlling excitation of a synchronous machineSIEMENS ENERGY & AUTOMAT·Filed 1986·Granted Apr 21, 1987·41 cites·34 claims
- 1682US4363060AArcless tap changer for voltage regulatorSIEMENS ALLIS INC·Filed 1981·Granted Dec 7, 1982·23 cites·6 claims
- 1780US4456871APower supply for electronic control systemSIEMENS ALLIS INC·Filed 1982·Granted Jun 26, 1984·36 cites·9 claims
- 1880US4050006AInverter having constant frequency chopper synchronized to modulation frequencyALLIS CHALMERS·Filed 1976·Granted Sep 20, 1977·22 cites·10 claims
- 1976US4516185ATime ratio control circuit for contactor or the likeSIEMENS ALLIS INC·Filed 1983·Granted May 7, 1985·24 cites·16 claims
- 2075US4301489AArcless tap changer utilizing static switchingSIEMENS ALLIS INC·Filed 1979·Granted Nov 17, 1981·22 cites·4 claims
- 2175US4048554AVariable frequency, variable voltage power supplyALLIS CHALMERS·Filed 1976·Granted Sep 13, 1977·19 cites·51 claims
- 2274US7595614B2Load tap changerPENNSYLVANIA TRANSFORMER TECHN·Filed 2007·Granted Sep 29, 2009·14 cites·20 claims
- 2373US4423458ASignal processing system for overload relay or the likeSIEMENS ALLIS INC·Filed 1982·Granted Dec 27, 1983·24 cites·20 claims
- 2471US4378580AConduction limit protection arrangement for power transistor switchALLIS CHALMERS·Filed 1981·Granted Mar 29, 1983·25 cites·21 claims
- 2570US4446498AElectronic control system for overload relay or the likeSIEMENS ALLIS INC·Filed 1982·Granted May 1, 1984·24 cites·28 claims
- 2664US4539618ADigitally controlled overload relaySIEMENS ALLIS INC·Filed 1984·Granted Sep 3, 1985·20 cites·5 claims
- 2758US5182518AInverter and battery testing for uninterruptible power systemsBEST POWER TECH INC·Filed 1991·Granted Jan 26, 1993·36 cites·43 claims
- 2854US5615129AMethod and apparatus for adaptive and corrective determination of battery run-time in uninterruptible power systemsGEN SIGNAL POWER SYSTEMS INC·Filed 1995·Granted Mar 25, 1997·35 cites·36 claims
- 2945US5160832AFront panel unit for electronic equipmentBEST POWER TECH INC·Filed 1991·Granted Nov 3, 1992·14 cites·7 claims
- 3042US4404442ACircuit interrupter having flash plates with interrupted surfacesSIEMENS ALLIS INC·Filed 1980·Granted Sep 13, 1983·5 cites·1 claims
- 3135US2017344039A1Arcless Tap Changer Using Gated Semiconductor DevicesCOOPER TECHNOLOGIES CO·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →