Brad E. Pingel

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Des Moines, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Door having hidden screw construction
- Patent number 5,230,180
- Issue date Jul 27, 1993
- Emco Enterprises, Inc.
- Robert C. Tweedt
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS