Patents by Inventor Donald Feith

Donald Feith 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).

  • System and apparatus for program controlled delivery of game balls
    Patent number: 4269163
    Abstract: An ejector for a sequence of game balls has variable device for setting a different trajectory for each ball and for varying the time interval between each ball delivery. A controller includes an input device used by the tennis player or instructor to enter the court and ball data for each of a sequence of balls; a converter for changing the court and ball data to corresponding trajectory data used in setting the ball ejector; and a digital memory for storing the data for each ball. The controller is switched to a programming mode for setting up the court and ball data for the sequence of balls to be delivered and to an operating mode in which the balls are delivered in accordance with the set program.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: May 26, 1981
    Assignee: United States Machine Works, Inc.
    Inventor: Donald Feith