Patents by Inventor John D. Gibson

John D. Gibson 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).

  • Self tripping dammer
    Patent number: 4213502
    Abstract: A dammer having three legs with a foot on the end of each leg is towed behind agricultural cultivating implements. Each foot slides flat against the earth until the weight of the soil causes the dammer to rotate, at which time the dammer rotates one-third of a revolution dumping one dam and continuing to form another.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: July 22, 1980
    Inventor: John D. Gibson