James D. Petzrick

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Beloit, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Fire-rated panel
- Patent number 5,481,834
- Issue date Jan 9, 1996
- Hufcor, Inc.
- Stanley Kowalczyk
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS