Patents by Inventor Francis Oster

Francis Oster 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).

  • Drawing device having mobile stylus tracing lines on glass plate
    Patent number: 4888874
    Abstract: A toy drawing device in which a window in a housing containing powder is covered by a glass plate whose edges are received within a groove in a sectioned rim joined to a window frame to prevent leakage of powder therefrom. A mobile stylus under the control of an operator acts to trace lines on a layer of powder adhering to the undersurface of the glass plate. To prevent injuries should the glass plate break, its outer surface is shielded by a transparent protective film formed of heat-formable, synthetic plastic material.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: December 26, 1989
    Assignee: Buddy L Corporation
    Inventor: Francis Oster