John T. Vayda

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Bethel Park, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Castable refractory
- Patent number 4,762,811
- Issue date Aug 9, 1988
- Dresser Industries, Inc.
- John T. Vayda
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES