Karl Sperr

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Chur, CH

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Patents Grantslast 30 patents

Information Patent Grant
Metal frame assembly for windows or doors
- Patent number 4,614,062
- Issue date Sep 30, 1986
- Swiss Aluminium Ltd.
- Karl Sperr
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS