Patents by Inventor Jakob Kehren

Jakob Kehren 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 and the like obstacle extractor
    Patent number: 3946988
    Abstract: A device for extracting trees, stumps and the like obstacles from the ground of the type having a pressure medium cylinder supported on a stand and with a holding member carried by its piston rod is provided which permits manual operation, the piston rod being spaced from the holding member and connected to a guide member for contacting the obstacle, and a holding member with a holding link for gripping the partly pulled out obstacle being rigidly mounted on the pressure cylinder.
    Type: Grant
    Filed: June 5, 1974
    Date of Patent: March 30, 1976
    Inventor: Jakob Kehren