Patents by Inventor Roger M. Sheaffer

Roger M. Sheaffer 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).

  • Patent number: 5441257
    Abstract: A distance marker system for mounting in a golf course fairway. The system includes a generally flat plate anchored in the ground and an upstanding cylindrical marker secured in a recessed cavity in the plate. When a reel-type mower encounters the marker from any direction, the marker is pushed away from its normal vertical position to a generally-horizontal position against the top of the plate. After the mower passes over the marker, the marker springs back to its normal vertical position again, without damage to the marker.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: August 15, 1995
    Inventor: Roger M. Sheaffer