Inventor · disambiguated record
Richard L. Zunkel
Also filed as: ZUNKEL RICHARD L
8 granted patents·316 citations·filing 1976–1987
90Inventor score
Top patents by PatentIndex Score
8 records- 0195US4115897AZero force hold open door closerEATON CORP·Filed 1977·Granted Sep 26, 1978·93 cites·18 claims
- 0287US4429490ADoor control switching deviceSCHLAGE LOCK CO·Filed 1982·Granted Feb 7, 1984·59 cites·10 claims
- 0386US4050114ADoor closer assemblyEATON CORP·Filed 1976·Granted Sep 27, 1977·47 cites·23 claims
- 0476US4414703ADoor closer and holderSCHLAGE LOCK CO·Filed 1981·Granted Nov 15, 1983·37 cites·4 claims
- 0566US4386446ADoor closerSCHLAGE LOCK CO·Filed 1981·Granted Jun 7, 1983·28 cites·2 claims
- 0654US4696500ADoorholder assembly for a pocket doorZUNKEL RICHARD L·Filed 1986·Granted Sep 29, 1987·22 cites·3 claims
- 0753US4721946ADoor control device with alarm switchZUNKEL RICHARD L·Filed 1986·Granted Jan 26, 1988·20 cites·26 claims
- 0828US4788742ATorque modification apparatus for use with a door closerDOOR CONTROL SPECIALTIES CO·Filed 1987·Granted Dec 6, 1988·10 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →