Patents by Inventor Donald W. Vierimaa

Donald W. Vierimaa 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).

  • Patent number: 4248427
    Abstract: A pinball type game utilizing an inclined, rotatable playing surface containing projections, guide rails, targets, traps, and at least one ball is described. The speed and direction of rotation of the playing surface is controlled by the player. The location and movement of the playing surface projections may be used to impart direction and speed to the playing ball. Barriers may be placed between some of the projections, thus aiding or hindering the ball striking a target or a trap. One or more ball propellers may be located on the playing surface to give the ball more action. Where holes are used as targets and traps, a means is provided to guide the ball dropping through a target or trap hole to channels which indicate the score obtained.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: February 3, 1981
    Inventor: Donald W. Vierimaa