Patents by Inventor Martin G. Franke

Martin G. Franke 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: 4639725
    Abstract: A case for displaying pictures to an audience with the pictures being selectively illuminated at the discretion of the operator for individually bringing them to the attention of the audience. The case is provided with a panel having a plurality of lamps for illuminating pictures contained on a picture panel that is positioned in front of the lights. A plurality of switches are provided for controlling the operation of the lamps with the number of switches being equal to the number of lamps on the panel so that each individual lamp can be operated by its associated switch. However, the different picture panels have various numbers of pictures in a variety of sizes and arrangements so that the individual panels require the operation of different lamps for illuminating the pictures.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: January 27, 1987
    Assignee: Martin G. Franke
    Inventor: Martin G. Franke