Patents by Inventor John D. Hayden

John D. Hayden 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: 5875573
    Abstract: A ditch digger having a horizontal cutting disc with spaced and angled replaceable cutting blades housed within a circular frame and surrounded in one semicircle by a dirt blocking chain barrier and by a solid guard barrier in the other semicircle. The digger is attached to a farm tractor via a 3 point hitch and includes a power takeoff connection. The forward portion of the digger's superstructure has a pair of collapsible stands which support the digger with the rear end wheel during storage. The wheel is provided with a height adjustment device for the ditch digger and maintains the position of the ditch digger in the ditch being dug.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: March 2, 1999
    Inventor: John D. Hayden