Patents by Inventor Darrel E. Williamson

Darrel E. Williamson 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).

  • Method and apparatus for anchoring flails on a string trimmer
    Patent number: 6094823
    Abstract: An apparatus and method for forming a string trimmer head assembly is disclosed. The head assembly includes a head and one or more flails. Each flail includes at least one deformed portion and at least one undeformed portion and the head includes a flail holding portion adapted to mate with the deformed portion for securing the flail to the head.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: August 1, 2000
    Assignee: Jenn Feng Industrial Company, Ltd.
    Inventors: Trever S. Brown, Darrel E. Williamson