Patents by Inventor Norman E. Bowman

Norman E. Bowman 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).

  • Emergency sign
    Patent number: 4682147
    Abstract: An illuminated exit sign having a plurality of series connected light emitting diodes arranged to form the word "exit" and a control circuit for supplying power to the series connected diodes from line power and, during power failures, from battery power. The control circuit illuminates the diodes continuously during normal operation and alternately switches the diodes on and off during a power failure.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: July 21, 1987
    Assignee: Don Gilbert Industries, Inc.
    Inventor: Norman E. Bowman