Patents by Inventor Fred A. Otter

Fred A. Otter 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).

  • Electroluminescent display having reversible voltage polarity
    Patent number: 5999150
    Abstract: An electroluminescent display having reversible polarity and a method for reducing latent images in the electroluminescent panel is provided. The electroluminescent display includes a waveform generator for supplying voltage pulses to illuminate pixels within the electroluminescent panel. The electroluminescent display according to the invention periodically reverses the polarity of the voltage pulses to reduce latent images in the electroluminescent panel. The electroluminescent display preferably utilizes an asymmetrical drive scheme to provide a brighter electroluminescent display.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: December 7, 1999
    Assignee: Northrop Grumman Corporation
    Inventors: William L. Nighan, Fred A. Otter, Russell A. Budzilek
  • Optical display from XeF excimer fluorescence
    Patent number: 4703229
    Abstract: An excimer optical display includes a plasma panel device having therein a mixture of gas comprising xenon and molecular fluorine and a selected amount of other gases forming XeF excimer molecules such that the color of fluorescence is adjustable over a broad spectrum by selection of the gas mixture constituents.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: October 27, 1987
    Assignee: United Technologies Corporation
    Inventors: William L. Nighan, Fred A. Otter, Jr.