Patents by Inventor John D. MacEwan, Jr.

John D. MacEwan, Jr. 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).

  • Excavating tool having hard-facing elements
    Patent number: 4187626
    Abstract: An excavating tool having hard-faced elements supported in the material engaging surface thereof, the elements having generally planar faces disposed at an angle to the ground engaging surface.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: February 12, 1980
    Assignee: ESCO Corporation
    Inventors: Donald J. Greer, John D. MacEwan, Jr.