Charles D. Welker

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Plano, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Foamed concrete composition and process
- Patent number 6,153,005
- Issue date Nov 28, 2000
- Welker; Charles D.
- Charles D. Welker
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES