John C. Purvis

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Cary, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Pre-cast blocks for use in column construction
- Patent number 8,839,593
- Issue date Sep 23, 2014
- Ply Gem Industries, Inc.
- David Barrett
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
Pre-Cast Blocks For Use In Column Construction
- Publication number 20110283657
- Publication date Nov 24, 2011
- David Barrett
- E04 - BUILDING