John H. Simmons

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Lyndhurst, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Investment shell molding apparatus and method
- Patent number 4,727,929
- Issue date Mar 1, 1988
- Precision Metalsmiths, Inc.
- John H. Simmons
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of making tooling
- Patent number 4,220,190
- Issue date Sep 2, 1980
- Precision Metalsmiths, Inc.
- Robert A. Horton
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method and apparatus for feeding granulated material
- Patent number RE30225
- Issue date Mar 11, 1980
- Precision Metalsmiths, Inc.
- John H. Simmons
- 164 - Metal founding
Information Patent Grant
Casting cut-off machine
- Patent number 4,123,876
- Issue date Nov 7, 1978
- Precision Metalsmiths, Inc.
- John H. Simmons
- B24 - GRINDING POLISHING
Information Patent Grant
Method and apparatus for feeding granulated material
- Patent number 4,016,922
- Issue date Apr 12, 1977
- Precision Metalsmiths, Inc.
- John H. Simmons
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL