Patents by Inventor Robert W. Riggs

Robert W. Riggs 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).

  • Mailbox delivery indicator apparatus
    Patent number: 7337945
    Abstract: The present invention relates to mailbox indicators. More specifically, the present invention relates to a mailbox delivery indicator apparatus with a signaling mechanism which is automatically triggered to deploy when the box is opened to indicate that the mail has been delivered.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: March 4, 2008
    Inventors: Robert W. Riggs, Donald Riggs