David J. Chrien

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Shaker Heights, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Utility trench system components
- Patent number 9,068,341
- Issue date Jun 30, 2015
- David J Chrien
- E04 - BUILDING
Information Patent Grant
Utility trench system components
- Patent number 8,826,613
- Issue date Sep 9, 2014
- David J Chrien
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
Utility trench system components
- Publication number 20140360114
- Publication date Dec 11, 2014
- David J. Chrien
- E04 - BUILDING