Patents by Inventor Robert Sinclair

Robert Sinclair 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).

  • Line marker buoy
    Patent number: D247354
    Type: Grant
    Filed: March 22, 1977
    Date of Patent: February 28, 1978
    Inventor: Robert Sinclair