Roger J. Norberg

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Prairie Farm, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Square butt door frame and method of assembly
- Patent number 4,843,775
- Issue date Jul 4, 1989
- Nichols- Homeshield, Inc.
- Laurence P. Armstrong
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS