grinding peripheral

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for cone shaping the crown and pavilion of gem...
- Patent number 5,293,858
- Issue date Mar 15, 1994
- Nizam U. Peters
- B24 - GRINDING POLISHING
Information Patent Grant
Concave-convex faceting method and apparatus
- Patent number 5,044,123
- Issue date Sep 3, 1991
- Douglas Hoffman
- B24 - GRINDING POLISHING
Information Patent Grant
Principles and appliances for the cutting of spherical-faceted gems...
- Patent number 5,003,791
- Issue date Apr 2, 1991
- Giovanni Colliva
- B24 - GRINDING POLISHING
Information Patent Grant
Principles and appliances for cutting of spherical-faceted gems and...
- Patent number 4,686,795
- Issue date Aug 18, 1987
- Giovanni Colliva
- B24 - GRINDING POLISHING
Information Patent Grant
3568368
- Patent number 3,568,368
- Issue date Mar 9, 1971
- B24 - GRINDING POLISHING
Information Patent Grant
2454597
- Patent number 2,454,597
- Issue date Nov 23, 1948
- B24 - GRINDING POLISHING
Information Patent Grant
2450742
- Patent number 2,450,742
- Issue date Oct 5, 1948
- B24 - GRINDING POLISHING
Information Patent Grant
2431907
- Patent number 2,431,907
- Issue date Dec 2, 1947
- B24 - GRINDING POLISHING
Information Patent Grant
2332574
- Patent number 2,332,574
- Issue date Oct 26, 1943
- B24 - GRINDING POLISHING