Patents by Inventor Darrell M. Hart

Darrell M. Hart 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).

  • Drumstick
    Patent number: 4047460
    Abstract: Two parts or shells, each composed of randomly oriented carbon or graphite fibers contained in a nylon matrix, are configured so that when sonically welded together an integral drumstick results.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: September 13, 1977
    Assignee: Riff Rite, Inc.
    Inventors: Mark A. Fiedler, Darrell M. Hart