Patents by Inventor Bjorn Kallberg

Bjorn Kallberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device for guiding a tool along a curve
    Patent number: 4694579
    Abstract: Apparatus to guide a tool along a curved template, has a curve follower connected to the tool, the curve follower includes two rotatable elements, one of which is driven and the other is freely rotatable. The two rotatable members resiliently contact the curve template from either side.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: September 22, 1987
    Inventor: Bjorn Kallberg