John D. Perry

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Calumet, CA

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Patents Grantslast 30 patents

Information Patent Grant
Chrome-magnesite refractories and method of preparation
- Patent number 4,574,119
- Issue date Mar 4, 1986
- Dresser Industries, Inc.
- John D. Perry
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES