Inventor · disambiguated record
John D. Petro
Also filed as: PETRO JOHN D
9 granted patents·147 citations·filing 1976–1987
89Inventor score
Files withCOMMERCIAL SHEARING9
Top patents by PatentIndex Score
9 records- 0191US4682939AGear pump or motor with tooth tips of dissimilar metalCOMMERCIAL SHEARING·Filed 1986·Granted Jul 28, 1987·45 cites·9 claims
- 0280US4777981AMagnetic detent joy stick and stack remote control valvesCOMMERCIAL SHEARING·Filed 1987·Granted Oct 18, 1988·39 cites·5 claims
- 0374US4187877ACompensated work port fluid valvesCOMMERCIAL SHEARING·Filed 1978·Granted Feb 12, 1980·21 cites·9 claims
- 0456US4519419AHydraulic valvesCOMMERCIAL SHEARING·Filed 1982·Granted May 28, 1985·12 cites·12 claims
- 0553US4058135ACompensated work port fluid valves and work port compensatorsCOMMERCIAL SHEARING·Filed 1976·Granted Nov 15, 1977·10 cites·4 claims
- 0651US4519420AHydraulic valvesCOMMERCIAL SHEARING·Filed 1982·Granted May 28, 1985·10 cites·9 claims
- 0737US4569367AHydraulic valve inlet unloadersCOMMERCIAL SHEARING·Filed 1985·Granted Feb 11, 1986·5 cites·10 claims
- 0830US4194366ATwo speed valves and bi-directional motor systemCOMMERCIAL SHEARING·Filed 1978·Granted Mar 25, 1980·2 cites·7 claims
- 0928US4338962AControl and relief valvesCOMMERCIAL SHEARING·Filed 1980·Granted Jul 13, 1982·3 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →