Patents by Inventor Betty McGraw

Betty McGraw 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).

  • Patent number: 4141178
    Abstract: A solar operated toy apparatus includes a transparent housing having a circularly shaped lens on the upper surface thereof adapted to focus the sun's rays into a reservoir area therebeneath. The housing is provided with centrally disposed apertures on the upper surface thereof and apertures in the bottom surface thereof to control the flow of warm air currents. A plurality of vanes are disposed horizontally and affixed to a vertical shaft which is coupled to the drive wheels rotatably affixed to the housing. The toy apparatus does not require any batteries for operation and is propelled by the rising air currents flowing therethrough.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: February 27, 1979
    Inventor: Betty McGraw