John H. Stockman

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Guilford, CT, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for engraving graphical representations upon workable materials
- Patent number 3,975,983
- Issue date Aug 24, 1976
- John H. Stockman
- B44 - DECORATIVE ARTS
Information Patent Grant
Master for engraving graphical representations upon workable materials
- Patent number 3,975,985
- Issue date Aug 24, 1976
- John H. Stockman
- B44 - DECORATIVE ARTS