by making use of a tool in the shape of an internal gear

Patents Grantslast 30 patents

  • Information Patent Grant

    Machine for the precision working of the tooth flanks of gear-shape...

    • Patent number 5,443,338
    • Issue date Aug 22, 1995
    • Hurth Maschinen und Werkzeuge G.m.b.H.
    • Manfred Huber
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    3147535

    • Patent number 3,147,535
    • Issue date Sep 8, 1964
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    2280045

    • Patent number 2,280,045
    • Issue date Apr 14, 1942
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR