Patents by Inventor Dana R. Harn

Dana R. Harn 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).

  • Method and apparatus for causing electric lamp to flash
    Patent number: 5451844
    Abstract: A circuit that includes a latch and an oscillator is attached to a common lamp control switch to cause the lamp to flash when the switch is manipulated in accordance with a prescribed pattern. The flashing draws attention to the lamp and is used, for example, in an emergency. In a first embodiment, the circuit is placed in parallel with the switch. In a second embodiment, the circuit is placed in series with the switch. In both embodiments, the circuit is small enough to fit within an existing switch box.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: September 19, 1995
    Assignee: Response Technology Corporation
    Inventors: Gerald D. Walkos, Dana R. Harn, William I. Walkos