Inventor · disambiguated record
Charles S. Kerfoot
Also filed as: KERFOOT CHARLES S
20 granted patents·637 citations·filing 1974–1997
96Inventor score
Top patents by PatentIndex Score
20 records- 0196US4893070ADomino effect shunt voltage regulatorUS AIR FORCE·Filed 1989·Granted Jan 9, 1990·78 cites·4 claims
- 0296US4686448ASlewing power supply for programmable phase shifter driveUS AIR FORCE·Filed 1986·Granted Aug 11, 1987·74 cites·5 claims
- 0395US5032799AMultistage cascode radio frequency amplifierWESTINGHOUSE ELECTRIC CORP·Filed 1990·Granted Jul 16, 1991·92 cites·11 claims
- 0489US5469124AHeat dissipating transformer coilWESTINGHOUSE ELECTRIC CORP·Filed 1994·Granted Nov 21, 1995·62 cites·17 claims
- 0582US5831409AElectric vehicle propulsion system employing AC induction motor controlNORTHROP GRUMMAN CORP·Filed 1997·Granted Nov 3, 1998·76 cites·2 claims
- 0680US5581171AElectric vehicle battery chargerNORTHROP GRUMMAN CORP·Filed 1994·Granted Dec 3, 1996·88 cites·11 claims
- 0780US5162965AAnti crow bar current interrupter for microwave tube transmittersUS AIR FORCE·Filed 1991·Granted Nov 10, 1992·33 cites·10 claims
- 0870US5070538AWide band domino effect high voltage regulatorUS AIR FORCE·Filed 1990·Granted Dec 3, 1991·23 cites·10 claims
- 0970US3955169AHigh power resistorUS AIR FORCE·Filed 1974·Granted May 4, 1976·22 cites·3 claims
- 1063US5634262AMethod of manufacturing heat dissipating transformer coilNORTHROP GRUMMAN CORP·Filed 1995·Granted Jun 3, 1997·21 cites·9 claims
- 1159USH275HPulse modulatorUS ARMY·Filed 1986·Granted May 5, 1987·12 cites·8 claims
- 1258US4683387AQuadrature switch apparatus for multi mode phase shift driversUS AIR FORCE·Filed 1985·Granted Jul 28, 1987·12 cites·4 claims
- 1357US4743785AFET pulse control apparatus with fast rise time and constant pulse levelWESTINGHOUSE ELECTRIC CORP·Filed 1987·Granted May 10, 1988·11 cites·10 claims
- 1449US4897617ADomino effect amplifierUS AIR FORCE·Filed 1989·Granted Jan 30, 1990·8 cites·5 claims
- 1541US5111382AHigh power, high frequency resonant inverter using MOS controlled thyristorsWESTINGHOUSE ELECTRIC CORP·Filed 1990·Granted May 5, 1992·7 cites·25 claims
- 1638US5122730AVoltage divider for a wide band domino effect high voltage regulatorUS AIR FORCE·Filed 1991·Granted Jun 16, 1992·5 cites·3 claims
- 1736US4939450APrecision high voltage FET pulse sense and clamp apparatus statement of government interestUS AIR FORCE·Filed 1989·Granted Jul 3, 1990·5 cites·6 claims
- 1830US4721900ASelf-generated converter filterUS AIR FORCE·Filed 1986·Granted Jan 26, 1988·1 cites·4 claims
- 1928US5283463AHigh power self commutating semiconductor switchWESTINGHOUSE ELECTRIC CORP·Filed 1992·Granted Feb 1, 1994·5 cites·13 claims
- 2028US4698742AHigh-voltage milberger slip slide power conditionerUS AIR FORCE·Filed 1986·Granted Oct 6, 1987·2 cites·11 claims
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