Patents by Inventor Richard A. Leoncavallo

Richard A. Leoncavallo 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).

  • Ball throwing machine
    Patent number: 4291663
    Abstract: A machine for throwing a ball with a cylindrical aperture. The machine comprises an arrangement for mounting a rod which carries the ball and which is rotatably mounted to fall from an initial vertical position to a selected angular position after a preselected period. At the selected angular position, a spring drive projects the ball through the air. In a preferred embodiment the ball, which may be of any type, is projected with a spiral motion.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: September 29, 1981
    Assignee: Mattel, Inc.
    Inventors: Gordon H. Buck, Otto L. Gabler, Eugene J. Kilroy, Richard Leoncavallo
  • Test tube rack
    Patent number: D284700
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: July 15, 1986
    Assignee: Sybron Corporation
    Inventors: Ravinder C. Mehra, Richard A. Leoncavallo