Richard L. Zunkel

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Princeton, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Door control switching device
- Patent number 4,429,490
- Issue date Feb 7, 1984
- Schlage Lock Company
- Richard L. Zunkel
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Door closer and holder
- Patent number 4,414,703
- Issue date Nov 15, 1983
- Schlage Lock Company
- Raymond H. Schnarr
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Door closer
- Patent number 4,386,446
- Issue date Jun 7, 1983
- Schlage Lock Company
- Richard L. Zunkel
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES