Sherman A. Stewart

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Rancho Palos Verdes, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Construction material in sheet form and method of joining sheets ed...
- Patent number 4,071,993
- Issue date Feb 7, 1978
- Grefco, Inc.
- Sherman A. Stewart
- E04 - BUILDING
Information Patent Grant
Sealing system
- Patent number 4,067,155
- Issue date Jan 10, 1978
- Grefco, Inc.
- David L. Ruff
- E04 - BUILDING
Information Patent Grant
Twin membrane, self sealing, mechanically fastened insulated roof d...
- Patent number 4,063,395
- Issue date Dec 20, 1977
- Grefco, Inc.
- Sherman A. Stewart
- E04 - BUILDING
Information Patent Grant
Twin membrane, self sealing, mechanically fastened insulated roof d...
- Patent number 3,958,373
- Issue date May 25, 1976
- Grefco, Inc.
- Sherman A. Stewart
- E04 - BUILDING