Patents by Inventor Douglas A. Leischer

Douglas A. Leischer 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).

  • Notched ditcher chain tooth
    Patent number: 4571859
    Abstract: The forwardly and outwardly inclined marginal edge of a conventional "cupped" ditcher chain tooth is provided with an elongated longitudinally extending shallow notch including front and rear ends spaced generally one-third the length of the tooth outer marginal edge from the front and rear ends of the tooth. The notch is of a length slightly less than one-third the length of the tooth outer marginal edge and the depth of the notch is between one-quarter and one-third the length of the notch.
    Type: Grant
    Filed: January 7, 1984
    Date of Patent: February 25, 1986
    Inventor: Douglas A. Leischer