William H. Birmingham

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Helena, MT, US

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Patents Grantslast 30 patents

Information Patent Grant
Window operator for manually or electrically motorized actuation of...
- Patent number 5,006,766
- Issue date Apr 9, 1991
- Rolscreen Company
- Ralph G. Yuhas
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Motorized window blind with manual overrride
- Patent number 4,934,438
- Issue date Jun 19, 1990
- Rolscreen Company
- Ralph G. Yuhas
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Window operating apparatus
- Patent number 4,653,228
- Issue date Mar 31, 1987
- Win-Trol, Inc.
- Ralph G. Yuhas
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES