Patents by Inventor Donald Killen

Donald Killen 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).

  • Golf club cleaning tool
    Patent number: 4908899
    Abstract: A tool for cleaning grooves having different cross-sectional profiles formed in the face of golf clubs which may also be used as a ball marker, for tightening cleats and repairing ball marks.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: March 20, 1990
    Inventor: Donald Killen