Patents by Inventor Ross Coffield

Ross Coffield 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).

  • Electrical sound producing device
    Patent number: D993325
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: July 25, 2023
    Assignee: SKOOGMUSIC LTD
    Inventors: David John Skulina, Benjaman Warren Schögler, Ross Coffield