Patents by Inventor Gerald L. Butler

Gerald L. Butler 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).

  • Aircraft
    Patent number: D308043
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: May 22, 1990
    Inventor: Gerald L. Butler
  • Aircraft
    Patent number: D311720
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 30, 1990
    Inventor: Gerald L. Butler