Patents by Inventor John J. Ottusch

John J. Ottusch 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: 11024278
    Abstract: An acoustic absorber is disclosed. The acoustic absorber contains a plurality of adjacent passages defined by walls configured to generate alternating high and low pressure zones as an acoustic energy travels though the acoustic absorber.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: June 1, 2021
    Assignee: HRL Laboratories, LLC
    Inventors: Adour V. Kabakian, Chia-Ming Chang, John J. Ottusch, John L. Visher, Geoffrey P. McKnight
  • Patent number: 7911407
    Abstract: A method for designing artificial impedance surfaces is disclosed. The method involves matching impedance component values required for a given far-field radiation pattern (determined, for example, by holographic means) with measured or simulated impedance component values for the units of a lattice of conductive structures used to create an artificial impedance surface, where the units of the lattice have varied geometry. For example, a unit could be a square conductive structure with a slice (removed or missing material) through it. The measured or simulated impedance components are determined by measuring wavevector values for test surfaces in three or more directions over any number of test surfaces, where each unit of a given test surface has the same geometric shape and proportions as all of the other units of that test surface, but each test surface has some form of variation in the unit geometry from the other test surfaces. These test measurements create a table of geometry vs.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: March 22, 2011
    Assignee: HRL Laboratories, LLC
    Inventors: Bryan Ho Lim Fong, Joseph S. Colburn, Paul R. Herz, John J. Ottusch, Daniel F. Sievenpiper, John L. Visher
  • Patent number: 4982082
    Abstract: A photodetector produces an output signal in response to irradiation by an optical beam from a pulsed laser. A delay unit delays the output signal for a period corresponding to one-half of one cycle of a beat frequency generated by interaction of two frequency components in the optical beam corresponding to two predetermined longitudinal modes of operation of the laser. A differential mixer subtractively combines the output of the photodetector with the output of the delay unit, to produce an output signal having the main profile of the laser pulses suppressed, and the beat frequency component, if present, amplified. A resonant circuit and amplifier may be provided to further amplify the beat frequency component. The output of the amplifier is integrated to produce a DC signal having a magnitude which corresponds to the amplitude of the beat frequency component. The DC signal is compared with a threshold value to discriminate between single and multimode operation of the laser.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: January 1, 1991
    Assignee: Hughes Aircraft Company
    Inventor: John J. Ottusch