for grinding cavities in gem stones

Patents Grantslast 30 patents

  • Information Patent Grant

    Vibratory material removal system, tool and method

    • Patent number 7,063,596
    • Issue date Jun 20, 2006
    • David Benderly
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Vibratory material removal system and method

    • Patent number 6,612,906
    • Issue date Sep 2, 2003
    • David Benderly
    • 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

    2382940

    • Patent number 2,382,940
    • Issue date Aug 14, 1945
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    2351134

    • Patent number 2,351,134
    • Issue date Jun 13, 1944
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    2351095

    • Patent number 2,351,095
    • Issue date Jun 13, 1944
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    1023513

    • Patent number 1,023,513
    • Issue date Apr 16, 1912
    • B24 - GRINDING POLISHING

Patents Applicationslast 30 patents