with balls engaging threads or grooves on the shaft of the bolt

Patents Grantslast 30 patents

  • Information Patent Grant

    3561316

    • Patent number 3,561,316
    • Issue date Feb 9, 1971
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    2941438

    • Patent number 2,941,438
    • Issue date Jun 21, 1960
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...