Patents by Inventor W. Tom Witherspoon

W. Tom Witherspoon 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 wand for injecting a liquid into the ground
    Patent number: 5306104
    Abstract: Liquid is pumped through a specially designed wand to create a hole in the ground. The wand is pushed downward into the hole to a selected depth. The wand is then pivoted about a vertical axis through 90.degree. during a period of five seconds. The wand is then pushed downward an additional one foot during a ten second period. The steps of the method are repeated until the wand has reached a selected maximum depth. The wand has a body with a vertical nozzle exiting through the bottom, and four horizontal nozzles exiting through side surfaces. Intermediate surfaces are interspersed between the side surfaces, giving the body of the wand a hexagonal cross section.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: April 26, 1994
    Inventor: W. Tom Witherspoon
  • Single arm belling tool
    Patent number: D325033
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: March 31, 1992
    Inventor: W. Tom Witherspoon