Patents by Inventor Adele K. Ledford

Adele K. Ledford 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).

  • Box harp
    Patent number: D246869
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: January 3, 1978
    Inventor: Adele K. Ledford
  • Box harp
    Patent number: D274627
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: July 10, 1984
    Inventor: Adele K. Ledford