Patents by Inventor Karl-Erik Arnold Jonsson

Karl-Erik Arnold Jonsson 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).

  • Tree felling device
    Patent number: 3968821
    Abstract: A tree felling device comprising a spherical bowl carrying an endless saw chain along its peripheral edge and mounted to be moved a limited angle around the center of an imagined sphere in which it is included.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: July 13, 1976
    Inventor: Karl-Erik Arnold Jonsson