Wallis G. Biesenthal

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Springfield, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Portable environmental barrier for an open door-way or window
- Patent number 4,738,053
- Issue date Apr 19, 1988
- Wallis G. Biesenthal
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS