David Friedwald

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Cherry Hill, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Fastening system for interconnecting sheets of plastic materials in...
- Patent number 4,707,894
- Issue date Nov 24, 1987
- Polycast Technology Corporation
- David Friedwald
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS