Patents by Inventor Douglas Dean Clarkson

Douglas Dean Clarkson 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: 6122991
    Abstract: A handlebar assembly and method of making same includes cutting a straight handlebar tube to a desired length, forming a reinforcing member or slug to fit within the tube including drilling and tapping radial bores and forming a longitudinal groove in the slug for the passage of control wires etc. Somewhat larger diameter bores are formed near the center of the handlebar tube in registry with the bores in the slug. The slug is then fixed in the tube in the desired position after which the tube is bent to the desired configuration and handgrip sections are formed. The handlebar is then finished as by chrome plating. A mount is formed having bores spaced like those of the slug and a longitudinal groove to support the center section of the handlebar. The mount is then finished as desired. Threaded fastening members are then passed through the bores in the mount and the handlebar and are screwed into the threaded bores in the slug to secure the assembly together.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: September 26, 2000
    Inventor: Douglas Dean Clarkson
  • Patent number: D415084
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: October 12, 1999
    Inventor: Douglas Dean Clarkson
  • Patent number: D425463
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: May 23, 2000
    Inventor: Douglas Dean Clarkson