Patents Assigned to Bruce R. Doyle
  • Patent number: 4593911
    Abstract: A manual dexterity toy in which a ball is caused to orbit along elliptical trajectories within the toy for as long as possible without having the ball escape to the exterior of the toy.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: June 10, 1986
    Assignee: Bruce R. Doyle
    Inventor: Richard Cory