with cutting teeth disposed on the inner periphery of a ring

Patents Grantslast 30 patents

  • Information Patent Grant

    1626821

    • Patent number 1,626,821
    • Issue date May 3, 1927
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    1434410

    • Patent number 1,434,410
    • Issue date Nov 7, 1922
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents