John Hay

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Shrewsbury, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Vitrified bonded sol gel sintered aluminous abrasive bodies
- Patent number 5,131,923
- Issue date Jul 21, 1992
- Norton Company
- Carole J. Markhoff-Matheny
- B24 - GRINDING POLISHING
Information Patent Grant
Nitrified bonded sol gel sintered aluminous abrasive bodies
- Patent number 4,997,461
- Issue date Mar 5, 1991
- Norton Company
- Carole J. Markhoff-Matheny
- B24 - GRINDING POLISHING
Information Patent Grant
Frit bonded abrasive wheel
- Patent number 4,898,597
- Issue date Feb 6, 1990
- Norton Company
- John Hay
- B24 - GRINDING POLISHING
Information Patent Grant
Ceramic bonded grinding wheel
- Patent number 4,634,453
- Issue date Jan 6, 1987
- Norton Company
- John Hay
- B24 - GRINDING POLISHING