Patents by Inventor Peter J. Wallace

Peter J. Wallace 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).

  • Chain digger attachment
    Patent number: 4974348
    Abstract: A chain digger attachment (10) for boom (11) mounted operation with disconnectable couplings (13, 66, 67), the attachment having a chain (17, 60) extended about sprockets (19,23,61,83) on a telescopic support frame(14,64,65) having sideways feeding discharging augers (27,28,81,82), clearing ploughs (72) and elongate chain guard (73) along the return reach of the chain (60).
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: December 4, 1990
    Inventor: Peter J. Wallace