Assignee
PARKER & HARPER MFG CO
US·6 granted patents·164 citations·filing 1976–1986
Top patents by PatentIndex Score
6 records- 0194US4087074ASpring return valve actuatorPARKER & HARPER MFG CO·Filed 1976·Granted May 2, 1978·47 cites·4 claims
- 0291US4046350APower actuated valvePARKER & HARPER MFG CO·Filed 1976·Granted Sep 6, 1977·55 cites·10 claims
- 0364US4326627ALimit switch for rotary control devicePARKER & HARPER MFG CO·Filed 1979·Granted Apr 27, 1982·11 cites·3 claims
- 0462US4727899APilot valve assemblyPARKER & HARPER MFG CO·Filed 1986·Granted Mar 1, 1988·20 cites·6 claims
- 0562US4193579ADetachable handle for control devicesPARKER & HARPER MFG CO·Filed 1977·Granted Mar 18, 1980·18 cites·3 claims
- 0648US4559966AValve handle with selectable stopsPARKER & HARPER MFG CO·Filed 1985·Granted Dec 24, 1985·13 cites·5 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →