Patents by Inventor Patrick W. Dennis

Patrick W. Dennis 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: 4763327
    Abstract: An ultra high frequency multiplexer for combining very high frequency data inputs to produce multiplexed data outputs in the Gigahertz range is provided. Typical ECL output data pulses from integrated circuits are employed as inputs to individual gates of a plurality of dual gates GaAs MESFETS. The second gate of the individual GaAs device is provided with an ultra high frequency clock enable pulse that produces a plurality of pulses are ultra high frequency pulse rates. The outputs of the GaAs devices are delayed one from the other and the delayed outputs are recombined in a combining network to provide a combined multiplexed data output at ultra high frequency.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: August 9, 1988
    Assignee: Unisys Corporation
    Inventors: John M. Fontaine, Patrick W. Dennis
  • Patent number: 4513290
    Abstract: A relatively short broad band monopole coaxial antenna is provided with a center conductor and an outer radiator. The antenna is mounted above a ground plane and comprises a bare outer radiator portion adjacent the ground plane and a portion remote from the ground plane which is covered with a variable thickness microwave absorbent material. The signal to be transmitted is applied to the base of the monopole antenna adjacent the ground plane. Non-radiated signals propagate up the antenna. The high frequency components are absorbed by the microwave absorbing material. A tip matching network and a base matching network are coupled between the outer conductor and the ground plane for attenuating and matching the low frequency components of the non-radiated signals. The resulting monopole coaxial antenna has no undesirable reflections and has the appearance of infinite effective length antenna.
    Type: Grant
    Filed: April 25, 1983
    Date of Patent: April 23, 1985
    Assignee: Sperry Corporation
    Inventors: Donald K. Lefevre, Patrick W. Dennis, Dennis F. Seegmiller