John J. Stephansky

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Fair Oaks, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Refractory block
- Patent number D591778
- Issue date May 5, 2009
- Harbison-Walker Refractories Company
- John J. Stephansky
- D15 - Machines not elsewhere specified
Information Patent Grant
Refractory block
- Patent number D567829
- Issue date Apr 29, 2008
- Harbison-Walker Refractories Company
- John J. Stephansky
- D15 - Machines not elsewhere specified