Inventor · disambiguated record
David J. Wickham
Also filed as: WICKHAM DAVID J · WICKHAM DAVID JOHN
26 granted patents·399 citations·filing 1974–1987
96Inventor score
Top patents by PatentIndex Score
26 records- 0198US4546298AElectric actuatorsWESTINGHOUSE BRAKE & SIGNAL·Filed 1984·Granted Oct 8, 1985·131 cites·14 claims
- 0296US4546295AElectric actuatorsWESTINGHOUSE BRAKE & SIGNAL·Filed 1984·Granted Oct 8, 1985·63 cites·8 claims
- 0394US4651852AElectrically-controlled actuatorsWESTINGHOUSE BRAKE & SIGNAL·Filed 1984·Granted Mar 24, 1987·42 cites·15 claims
- 0476US4364609AEmpty/load brake control valve apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1978·Granted Dec 21, 1982·14 cites·2 claims
- 0571US3948083AFluid pressure apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1974·Granted Apr 6, 1976·16 cites·9 claims
- 0666US4157849AContinuous quick service apparatus for vehicle braking controlWESTINGHOUSE BRAKE & SIGNAL·Filed 1976·Granted Jun 12, 1979·9 cites·5 claims
- 0761US4025125AFluid pressure operable brake control valve apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1975·Granted May 24, 1977·8 cites·6 claims
- 0860US4760895AElectric actuatorsWESTINGHOUSE BRAKE & SIGNAL·Filed 1987·Granted Aug 2, 1988·17 cites·10 claims
- 0958US4206949AContinuous quick service valves for braking systemsWESTINGHOUSE BRAKE & SIGNAL·Filed 1978·Granted Jun 10, 1980·8 cites·5 claims
- 1057US4070068AVehicle braking control apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1977·Granted Jan 24, 1978·7 cites·10 claims
- 1156US4571008AControl valve arrangementWESTINGHOUSE BRAKE & SIGNAL·Filed 1982·Granted Feb 18, 1986·8 cites·10 claims
- 1256US4478460AInterlock valve for railway braking system valve assemblyWESTINGHOUSE BRAKE & SIGNAL·Filed 1982·Granted Oct 23, 1984·13 cites·4 claims
- 1351US4268989ABuoyant device with means for producing thrustWICKHAM DAVID J·Filed 1978·Granted May 26, 1981·11 cites·6 claims
- 1450US4264110ATrain braking apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1978·Granted Apr 28, 1981·5 cites·6 claims
- 1550US4103977AVehicle braking control valve apparatus for quick service operationWESTINGHOUSE BRAKE & SIGNAL·Filed 1977·Granted Aug 1, 1978·5 cites·8 claims
- 1649US4644180AActuator emergency operationWESTINGHOUSE BRAKE & SIGNAL·Filed 1985·Granted Feb 17, 1987·7 cites·7 claims
- 1749US4043606ARail vehicle brake pipe valve arrangement having a fluid pressure drop detector and a vent valve controlled thereby for brake pipe pressure gradient reductionWESTINGHOUSE BRAKE & SIGNAL·Filed 1976·Granted Aug 23, 1977·5 cites·8 claims
- 1846US4319787ARail vehicle braking apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1980·Granted Mar 16, 1982·5 cites·5 claims
- 1945US4492412ABraking cylinder inlet valve arrangement in braking systems for railway vehiclesWESTINGHOUSE BRAKE & SIGNAL·Filed 1982·Granted Jan 8, 1985·6 cites·3 claims
- 2041US4649329AElectric actuatorsWESTINGHOUSE BRAKE & SIGNAL·Filed 1985·Granted Mar 10, 1987·7 cites·10 claims
- 2140US4199198AVehicle braking control apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1978·Granted Apr 22, 1980·3 cites·6 claims
- 2239US3966272ARail vehicle braking system with improved brake signal propagationWESTINGHOUSE BRAKE & SIGNAL·Filed 1974·Granted Jun 29, 1976·5 cites·8 claims
- 2336US4095850ABrake control valve apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1977·Granted Jun 20, 1978·2 cites·2 claims
- 2433US4050745ABrake control valve apparatusWESTINGHOUSE BRAKE & SIGNAL·Filed 1975·Granted Sep 27, 1977·1 cites·2 claims
- 2530US4493511ACombined BC pressure-maintaining valve and quick service bulb exhaust valveWESTINGHOUSE BRAKE & SIGNAL·Filed 1982·Granted Jan 15, 1985·0 cites·3 claims
- 2620US4552410ABraking systems for railwayWESTINGHOUSE BRAKE & SIGNAL·Filed 1983·Granted Nov 12, 1985·1 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →