of gem stones or convex surfaces, cabochons

Patents Grantslast 30 patents

  • Information Patent Grant

    Automatic gemstone polishing robot

    • Patent number 11,904,433
    • Issue date Feb 20, 2024
    • Freedom Automation Solutions LLP
    • Ivan Nikolayevich Sytenko
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Automated gemstone feeding

    • Patent number 11,897,088
    • Issue date Feb 13, 2024
    • Sahajanand Technologies Private Limited
    • Chirag Dineshchandra Oza
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method for controlling the polishing of gemstones

    • Patent number 11,673,228
    • Issue date Jun 13, 2023
    • OctoNus Finland OY
    • Sergey Borisovich Sivovolenko
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Multi-set clamping fixture for diamond machining

    • Patent number 11,207,798
    • Issue date Dec 28, 2021
    • Shanghai Zhengshi Technology Co., Ltd.
    • Weidong Man
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Concave-convex faceting method and apparatus

    • Patent number 5,044,123
    • Issue date Sep 3, 1991
    • Douglas Hoffman
    • B24 - GRINDING POLISHING
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    Cabochon copy grinding apparatus

    • Patent number 4,459,780
    • Issue date Jul 17, 1984
    • Takahiro Imahashi
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Device particularly useful for cutting or grinding round girdles of...

    • Patent number 4,233,783
    • Issue date Nov 18, 1980
    • Stark; Hanoch
    • Hanoch Stark
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Cabbing device for gemstones

    • Patent number 4,201,018
    • Issue date May 6, 1980
    • Clarence Pool
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Lapidary device

    • Patent number 4,174,592
    • Issue date Nov 20, 1979
    • Paul E. Bernhardt
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Device for grinding a cabachon

    • Patent number 4,010,575
    • Issue date Mar 8, 1977
    • Henry L. Henry
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3882641

    • Patent number 3,882,641
    • Issue date May 13, 1975
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3849945

    • Patent number 3,849,945
    • Issue date Nov 26, 1974
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3844070

    • Patent number 3,844,070
    • Issue date Oct 29, 1974
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3834085

    • Patent number 3,834,085
    • Issue date Sep 10, 1974
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3774347

    • Patent number 3,774,347
    • Issue date Nov 27, 1973
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3673742

    • Patent number 3,673,742
    • Issue date Jul 4, 1972
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3568369

    • Patent number 3,568,369
    • Issue date Mar 9, 1971
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3420005

    • Patent number 3,420,005
    • Issue date Jan 7, 1969
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3364629

    • Patent number 3,364,629
    • Issue date Jan 23, 1968
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    3279127

    • Patent number 3,279,127
    • Issue date Oct 18, 1966
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    2573371

    • Patent number 2,573,371
    • Issue date Oct 30, 1951
    • B24 - GRINDING POLISHING

Patents Applicationslast 30 patents