Patents by Inventor Percy J. Gray

Percy J. Gray 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).

  • Clamshell bucket apparatus
    Patent number: 3934917
    Abstract: A clamshell bucket apparatus adapted to be suspended from a cable or line which may be used for raising, lowering and operating the bucket for picking up and dumping a load.
    Type: Grant
    Filed: December 10, 1973
    Date of Patent: January 27, 1976
    Assignee: McGinnes Manufacturing Company
    Inventors: Curtis L. Paxton, Percy J. Gray