Patents by Inventor Frederic G. Croydon

Frederic G. Croydon 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).

  • Drill bit
    Patent number: 4330229
    Abstract: A drill bit having a generally cylindrical body with a working end and flutes extending along the body. The working end is formed with a central work-engaging point and a pair of slitting spurs spaced outwardly from the point adjacent edge margins of the body. Convexly contoured portions interconnect the point and spurs to permit sharpening with a round file.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: May 18, 1982
    Assignee: Omark Industries, Inc.
    Inventor: Frederic G. Croydon
  • Circular saw blade or the like
    Patent number: D277930
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: March 12, 1985
    Assignee: Omark Industries, Inc.
    Inventor: Frederic G. Croydon
  • Circular saw blade
    Patent number: D277931
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: March 12, 1985
    Assignee: Omark Industries, Inc.
    Inventor: Frederic G. Croydon
  • Circular saw blade
    Patent number: D283784
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: May 13, 1986
    Assignee: Omark Industries, Inc.
    Inventor: Frederic G. Croydon