David B. Wightman

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White Bear Lake, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Mechanical latch system
- Patent number 5,481,889
- Issue date Jan 9, 1996
- Federal-Hoffman, Inc.
- John E. Richard
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Detachable fastener for electrical enclosures
- Patent number 4,917,421
- Issue date Apr 17, 1990
- Federal-Hoffman, Inc.
- David B. Wightman
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES