Patents by Inventor Donald R. Hart

Donald R. Hart 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).

  • Method of machining of aluminum
    Patent number: 5651295
    Abstract: Machining of internal and external grooves in aluminum based alloys is performed through the use of a sharp edge physical vapor deposition coated cemented carbide cutting tool.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: July 29, 1997
    Assignees: Kennametal Inc., General Motors Corportion
    Inventors: Russell J. Tumey, Robert L. De Corte, Donald R. Hart, Alvin J. Lang
  • Apparatus and method for wrapping core yarns
    Patent number: 4232507
    Abstract: Apparatus and method for wrapping core yarns, the apparatus including a plurality of spools driven by a single spindle and the method including the steps of applying two or more layers of wrapped yarn to a core yarn by the use of a minimum number of spindles.
    Type: Grant
    Filed: February 22, 1973
    Date of Patent: November 11, 1980
    Assignee: Carlo Menegatto
    Inventors: Francis B. Northup, Donald R. Hart