Patents Assigned to Bulten-Kanthal AB
  • Screw driver bit
    Patent number: 3943986
    Abstract: A screw driver bit for use with power screw drivers having at the mounting end thereof three equiangularly spaced axial recesses which form three equiangularly spaced drive surfaces for engagement by mating surfaces within a drive socket in the power screw driver.
    Type: Grant
    Filed: March 4, 1975
    Date of Patent: March 16, 1976
    Assignee: Bulten-Kanthal AB Hallstahammar
    Inventor: Sixten Harald Lejdegard