John J. Stephansky

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Fair Oaks, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
High aluminia tar-impregnated pressure pouring tubes
- Patent number 5,151,200
- Issue date Sep 29, 1992
- Dresser Industries, Inc.
- John J. Stephansky
- B22 - CASTING POWDER METALLURGY