Patents by Inventor Robert Hillberg

Robert Hillberg 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).

  • Rifle
    Patent number: D262567
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: January 5, 1982
    Inventor: Robert Hillberg
  • Handgun
    Patent number: D263413
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: March 16, 1982
    Assignee: COP, Inc.
    Inventor: Robert Hillberg