Patents by Inventor Wendell K. Castle

Wendell K. Castle 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).

  • Grand piano
    Patent number: D318059
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: July 9, 1991
    Assignee: Steinway Musical Properties, Inc.
    Inventor: Wendell K. Castle