Inventor · disambiguated record
Fred G. Turnbull
Also filed as: TURNBULL FRED G · TURNBULL FRED GERDES
10 granted patents·284 citations·filing 1976–1995
91Inventor score
Top patents by PatentIndex Score
10 records- 0190US4066938AInput current modulation to reduce torque pulsations in controlled current inverter drivesGEN ELECTRIC·Filed 1976·Granted Jan 3, 1978·43 cites·6 claims
- 0289US4933621ACurrent chopping strategy for switched reluctance machinesGEN ELECTRIC·Filed 1989·Granted Jun 12, 1990·60 cites·10 claims
- 0388US4354223AStep-up/step down chopperGEN ELECTRIC·Filed 1981·Granted Oct 12, 1982·45 cites·7 claims
- 0487US4447868ARegenerative rectifier circuitGEN ELECTRIC·Filed 1982·Granted May 8, 1984·42 cites·3 claims
- 0585US4449176ASingle phase regeneration with a polyphase rectification power circuitGEN ELECTRIC·Filed 1982·Granted May 15, 1984·39 cites·7 claims
- 0670US4255695AMethod and apparatus for control of inverter synchronous machine drive systemGEN ELECTRIC·Filed 1978·Granted Mar 10, 1981·16 cites·14 claims
- 0761US4321478AAuxiliary power supply with kinetic energy storageGEN ELECTRIC·Filed 1979·Granted Mar 23, 1982·18 cites·10 claims
- 0848US4764744AOverload relay having adjustably gapped current transformersGEN ELECTRIC·Filed 1987·Granted Aug 16, 1988·8 cites·12 claims
- 0940US5656870ACurrent control for superconducting magnetic energy storage systemINTERMAGNETICS GENERAL CORP·Filed 1995·Granted Aug 12, 1997·11 cites·13 claims
- 1033US4074339AMethod and apparatus for measuring the speed of a rotating shaftGEN ELECTRIC·Filed 1976·Granted Feb 14, 1978·2 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →