David B. Bitzan

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Elkhorn, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Abuse-resistant cast acoustical ceiling tile having an excellent so...
- Patent number 8,337,976
- Issue date Dec 25, 2012
- USG Interiors, Inc.
- Thomas M. Mayers
- E04 - BUILDING
Information Patent Grant
Sag resistant, cast acoustical ceiling tile and method for making t...
- Patent number 5,753,871
- Issue date May 19, 1998
- USG Interiors, Inc.
- Bruce J. Kahara
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Patents Applicationslast 30 patents

Information Patent Application
Abuse-resistant cast acoustical ceiling tile having an excellent so...
- Publication number 20050191465
- Publication date Sep 1, 2005
- Thomas M. Mayers
- E04 - BUILDING