Inventor · disambiguated record
Harry A. Petrak
Also filed as: PETRAK HARRY A
10 granted patents·202 citations·filing 1978–1991
91Inventor score
Top patents by PatentIndex Score
10 records- 0181US5123513ARemote-activated, power shift clutch assembly with positive lockingBOULDER 12 INVESTMENTS·Filed 1991·Granted Jun 23, 1992·32 cites·16 claims
- 0278US4331210ALive spindle vehicle drive wheel assembly with axially moveable axleTENNECO INC·Filed 1980·Granted May 25, 1982·27 cites·14 claims
- 0378US4287972AAutomatic clutch assemblyPETRAK HARRY A·Filed 1979·Granted Sep 8, 1981·31 cites·24 claims
- 0472US4694943AGround clutch assembly with dynamic engagement and disengagementBOULDER 12 INVESTMENTS·Filed 1986·Granted Sep 22, 1987·30 cites·25 claims
- 0561US4396098AForce-responsive shock absorbing apparatusBOULDER 12 INVESTMENTS·Filed 1981·Granted Aug 2, 1983·20 cites·23 claims
- 0661US4262785ATorque responsive hub clutchMECHANEX CORP·Filed 1978·Granted Apr 21, 1981·15 cites·27 claims
- 0761US4238014AAutomatic locking gear for four wheeled drive vehiclesPETRAK HARRY A·Filed 1978·Granted Dec 9, 1980·16 cites·18 claims
- 0856US4378868ALive spindle wheel assembly with torque responsive drive engagement meansTENNECO INC·Filed 1980·Granted Apr 5, 1983·11 cites·13 claims
- 0951US4557358ASynchronized clutch assembly with selective override for four-wheel drive vehiclesTENNECO INC·Filed 1983·Granted Dec 10, 1985·11 cites·17 claims
- 1044US5044479ARemote-activated, power shift clutch assemblyBOULDER 12 INVESTMENTS·Filed 1990·Granted Sep 3, 1991·9 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →