Newton W. Charlton

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Thousand Oaks, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fail-secure and fail-safe door lock mechanism
- Patent number 4,579,376
- Issue date Apr 1, 1986
- Security Engineering, Inc.
- Newton W. Charlton
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Electric fail-secure/fail-open lock mechanism
- Patent number 4,557,121
- Issue date Dec 10, 1985
- Security Engineering, Inc.
- Newton W. Charlton
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES