Patents by Inventor Ronald Dupre

Ronald Dupre 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).

  • Coin-operated table tennis table
    Patent number: 5733211
    Abstract: Vertically-moving frame operates in a slot at the net line of a table tennis table. The top of the frame preferably carries the net. When the frame is down, the net is in the usual playing position. When the time is up, the frame is raised, forming a barrier to further play.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: March 31, 1998
    Inventor: Ronald Dupre