Marvin E. Roberts

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Reno, NV, US

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Patents Grantslast 30 patents

Information Patent Grant
Rotary disc-tumbler lock cylinder
- Patent number 4,195,503
- Issue date Apr 1, 1980
- Marvin E. Roberts
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Key construction
- Patent number 4,111,021
- Issue date Sep 5, 1978
- Roberts; Marvin E.
- Marvin E. Roberts
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Key and tumbler construction
- Patent number 4,109,495
- Issue date Aug 29, 1978
- Marvin E. Roberts
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Key construction
- Patent number 4,109,497
- Issue date Aug 29, 1978
- Marvin E. Roberts
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES