Patents by Inventor Donald Paul Cochran

Donald Paul Cochran 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).

  • Self-centering spade drill
    Patent number: 5967711
    Abstract: An improved self centering spade drill having at least three cutting blades extending radially outward from the center of the drill, the front edge of the blade constituting the cutting portion of the drill, the rear edge of the blade constituting the port end of the drill which are adapted to be received and supported by a drill holder.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: October 19, 1999
    Inventor: Donald Paul Cochran
  • Self centering spade drill
    Patent number: 5725337
    Abstract: An improved self centering spade drill having at least three cutting blades extending radially outward from the center of the drill, the front edge of the blade constituting the cutting portion of the drill, the rear edge of the blade constituting the port end of the drill which are adapted to be received and supported by a drill holder.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: March 10, 1998
    Inventor: Donald Paul Cochran