Patents by Inventor Melanie T. Campbell

Melanie T. Campbell 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 production aide
    Patent number: 5088814
    Abstract: A drawing production aide is disclosed which is designed to be placed over a working surface where an artist, engineer or architect is drawing. The device includes a carrier for a drawing and a light and lens system designed to project the drawing on the working surface. In a further aspect, the inventive aide includes an adjustable grid device designed to be used to visualize a scene in terms of a plurality of subsections, to best facilitate drawing the scene.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: February 18, 1992
    Inventor: Melanie T. Campbell