James N. Johnson

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Youngstown, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Micro-finishing apparatus
- Patent number 6,220,940
- Issue date Apr 24, 2001
- Grinding Equipment & Machinery Co., Inc.
- James N. Johnson
- B24 - GRINDING POLISHING
Information Patent Grant
Abrasive-belt conversion wheel for cylindrical grinders
- Patent number 5,593,345
- Issue date Jan 14, 1997
- James N. Johnson
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Finishing machine for trochoidal surfaces
- Patent number 5,042,204
- Issue date Aug 27, 1991
- James N. Johnson
- B24 - GRINDING POLISHING
Information Patent Grant
Micro-abrasive finishing device
- Patent number 4,796,387
- Issue date Jan 10, 1989
- James N. Johnson
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...