Patents by Inventor Raymond N. Mickelson

Raymond N. Mickelson 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).

  • Star-shaped flexible cutting line
    Patent number: 4869055
    Abstract: A line for a rotating trimmer, the line having a plurality of sharp edges extending longitudinally thereof and spaced circumferentially from each other, with remainder portions, between adjacent edges, depressed, each of the depressions being depressed at least 10 percent of the straight line distance between two adjacent edges on opposite sides thereof. Such line presents only sharpened edges to the material to be cut.
    Type: Grant
    Filed: May 4, 1988
    Date of Patent: September 26, 1989
    Assignee: Omark Industries, Inc.
    Inventor: Raymond N. Mickelson