William C. Pumphrey

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Spring, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Cement mixing system
- Patent number 5,389,145
- Issue date Feb 14, 1995
- The Western Company of North America
- D. V. Satyanarayana Gupta
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES