Patents by Inventor Joacim Einvall

Joacim Einvall 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).

  • Handle for a file having polygonal cross section
    Patent number: 5762344
    Abstract: A file of polygonal cross section is secured frictionally in a hole of a handle. The hole has as many corners as the file, and a surface extends between adjacent pairs of the corners of the hole. Each of those surfaces includes a concave segment and a convex segment. The concave segment is shaped such that relative rotation between the handle and file causes the corners of the file to tightly engage the concave segments to secure the file within the handle.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Sandvik AB
    Inventor: Joacim Einvall