Inventor · disambiguated record
Donald L. Ferris
Also filed as: FAIZ ROBERT L · FERRIS DONALD L · FERRIS DONALD LEROY
26 granted patents·708 citations·filing 1975–1988
97Inventor score
Top patents by PatentIndex Score
26 records- 0191US4244677ACross-beam helicopter rotor with readily replaceable snubberUNITED TECHNOLOGIES CORP·Filed 1978·Granted Jan 13, 1981·69 cites·9 claims
- 0284US4688993ATangential link swashplate centering memberUNITED TECHNOLOGIES CORP·Filed 1985·Granted Aug 25, 1987·69 cites·4 claims
- 0381US4105365AHelicopter rotor lead-lag damperUNITED TECHNOLOGIES CORP·Filed 1976·Granted Aug 8, 1978·44 cites·7 claims
- 0480US4047839ATorque reacting means for the hubs of cross beam rotorsUNITED TECHNOLOGIES CORP·Filed 1976·Granted Sep 13, 1977·42 cites·11 claims
- 0579US4373862ARotor blade shaft integrity monitoring systemUNITED TECHNOLOGIES CORP·Filed 1981·Granted Feb 15, 1983·44 cites·7 claims
- 0679US3972491ATwo-position helicopter main rotorUNITED TECHNOLOGIES CORP·Filed 1975·Granted Aug 3, 1976·42 cites·70 claims
- 0774US4087203ACross beam rotorUNITED TECHNOLOGIES CORP·Filed 1977·Granted May 2, 1978·33 cites·5 claims
- 0871US4299538ACross beam rotorUNITED TECHNOLOGIES CORP·Filed 1978·Granted Nov 10, 1981·30 cites·11 claims
- 0968US4284387ABlade fold restraint systemUNITED TECHNOLOGIES CORP·Filed 1979·Granted Aug 18, 1981·28 cites·7 claims
- 1067US4439106ARotor blade shaft integrity monitoring systemUNITED TECHNOLOGIES CORP·Filed 1982·Granted Mar 27, 1984·32 cites·5 claims
- 1162US4174137AControl rod roll-over limiterUS ARMY·Filed 1978·Granted Nov 13, 1979·24 cites·4 claims
- 1261US4714450AElastomeric high torque, constant velocity jointUNITED TECHNOLOGIES CORP·Filed 1986·Granted Dec 22, 1987·27 cites·6 claims
- 1361US4047838ABlade pitch control mechanism for helicoptersUNITED TECHNOLOGIES CORP·Filed 1976·Granted Sep 13, 1977·25 cites·9 claims
- 1459US4235570AElastomeric helicopter rotor load reaction systemUNITED TECHNOLOGIES CORP·Filed 1978·Granted Nov 25, 1980·25 cites·2 claims
- 1558US4804315AComposite helicopter swashplateUNITED TECHNOLOGIES CORP·Filed 1987·Granted Feb 14, 1989·24 cites·1 claims
- 1657US4797064AComposite helicopter rotor hubUNITED TECHNOLOGIES CORP·Filed 1987·Granted Jan 10, 1989·22 cites·14 claims
- 1757US4178130AHelicopter rotor having lead-lag damper operable with pitch and flap decouplingUNITED TECHNOLOGIES CORP·Filed 1977·Granted Dec 11, 1979·22 cites·8 claims
- 1853US4874292AApparatus for damping helicopter rotor blade oscillationsUS ARMY·Filed 1988·Granted Oct 17, 1989·21 cites·4 claims
- 1953US4569629AHelicopter gimbal rotorUNITED TECHNOLOGIES CORP·Filed 1984·Granted Feb 11, 1986·19 cites·1 claims
- 2051US4575358AAccommodating axial load in an elastomeric high torque, constant velocity jointUNITED TECHNOLOGIES CORP·Filed 1984·Granted Mar 11, 1986·17 cites·1 claims
- 2146US4588355AFlexible swashplate centering memberUNITED TECHNOLOGIES CORP·Filed 1984·Granted May 13, 1986·14 cites·3 claims
- 2236US4676669ATailoring tilt in an elastomeric high torque, constant velocity jointUNITED TECHNOLOGIES CORP·Filed 1986·Granted Jun 30, 1987·8 cites·2 claims
- 2336US4645423ATension/compression rod arrangement for damping helicopter rotor blade oscillationsUNITED TECHNOLOGIES CORP·Filed 1985·Granted Feb 24, 1987·10 cites·7 claims
- 2436US4368006ADroop stop for fully articulated rotorUS NAVY·Filed 1980·Granted Jan 11, 1983·9 cites·1 claims
- 2530US4242047AAdjustable bearing centering means for helicopter rotor elastomeric bearingsUNITED TECHNOLOGIES CORP·Filed 1979·Granted Dec 30, 1980·2 cites·4 claims
- 2625US4668115AHelicopter rotor spindle retention assemblyUNITED TECHNOLOGIES CORP·Filed 1986·Granted May 26, 1987·6 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →