David G. Madden

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Mesa, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Clean room wall system
- Patent number 5,199,235
- Issue date Apr 6, 1993
- Motorola, Inc.
- Michael H. Holkenbrink
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS