Patents by Inventor Theo M. S. Coster

Theo M. S. Coster 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).

  • Toy construction element
    Patent number: 4740188
    Abstract: An elongate rectangular bar useful as a toy construction element and including one or more apertures and one or more pairs of transversely aligned notches. Each aperture has a generally non-circular configuration and defines top bottom and intermediate portions each having a constant width.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: April 26, 1988
    Inventor: Theo M. S. Coster
  • Marker board
    Patent number: 4045013
    Abstract: A marker board and a method for making same which board embodies a frame structure that defines the spatial extent of the board, an array of annular bar rings forming at least a part of the frame, and a plurality of flexible shells, each having peripheral base portions integrally formed with the rings and being independent and reversibly invertible with respect to the frame.
    Type: Grant
    Filed: September 5, 1974
    Date of Patent: August 30, 1977
    Inventor: Theo M. S. Coster