Patents by Inventor John Sperti

John Sperti 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).

  • Music scale
    Patent number: D276443
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: November 20, 1984
    Inventor: John Sperti