Ronald T. Stefanek

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Lockport, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
High security cylinder lock
- Patent number 5,079,936
- Issue date Jan 14, 1992
- Folger Adam Company
- Ronald T. Stefanek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Security lock
- Patent number 4,593,543
- Issue date Jun 10, 1986
- Folger Adam Company
- Ronald T. Stefanek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES