Patents by Inventor Einar W. Andersson

Einar W. Andersson 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).

  • Wedge arrangement
    Patent number: 4130270
    Abstract: A pair of pointed, rearwardly toothed wedge members are pivotally mounted at their rear or blunt ends to spaced positions on a drive handle head, whereby they may be successively and alternatingly driven into a saw cut in a tree by pumping the handle.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: December 19, 1978
    Assignee: Sandvik Aktiebolag
    Inventor: Einar W. Andersson