Charles Herbert Warwick

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Lake Oswego, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Fire endurance door
- Patent number 4,367,614
- Issue date Jan 11, 1983
- Tyre Mfg. Co., Inc.
- Charles H. Warwick
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Panel with core and method of constructing
- Patent number 4,015,393
- Issue date Apr 5, 1977
- Charles Herbert Warwick
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS