Patents by Inventor Moayyed Hussain

Moayyed Hussain 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: 6587213
    Abstract: The present invention is a nondestructive and quantitative laser ultrasonic laser apparatus and associated method for determining adhesion quality of a coating on a substrate. The apparatus of the invention is preferably a pulsed laser for generation and Michelson-type interferometer based system and includes a rotary probe head assembly for making evaluations within a cylindrical test specimen. The method of the invention includes data analysis that uses acquired data from the ultrasonic laser apparatus and computes the dispersion relation or curves (frequency versus velocity) using a ridge-following technique in wavelet analysis and from this, outputs the adhesive quality of the coating by comparing it with a theoretically based determination of a particular coating/substrate bond system. The invention is used for evaluating adhesion quality of coatings used in a gun bore.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: July 1, 2003
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Bryon Knight, Julius Frankel, Moayyed Hussain, Jeffrey Braunstein
  • Patent number: 5548561
    Abstract: In a digital ultrasound imaging system, artifacts due to spurious ultrasound reflections from a highly reflective object outside the region of interest are reduced in magnitude by apparatus included in the beamforming system of the digital imaging system. A null is formed in a specified direction in the ultrasound beam patterns by perturbing the time delay on each receive channel. After estimating the direction of the highly reflective, interfering object and computing a time delay perturbation using a very fast algorithm, a null approximately 10 dB deep is introduced into each beam in the direction of the interfering object. This null reduces the magnitude of artifacts in the image, thereby providing image enhancement.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: August 20, 1996
    Assignee: General Electric Company
    Inventors: Moayyed A. Hussain, Kenneth W. Rigby, Koeunyi Bae
  • Patent number: 5515060
    Abstract: An active array antenna for use, for example, in a radar system, includes elemental antennas, each with a T/R module, distributed over a circular aperture. For lowest cost, the aperture is thinned. The T/R modules are operated at maximum output, to achieve maximum DC-to-RF efficiency, and for simplicity. A phase controller controls the phase shift which is imparted by each module to its signal, to form a main beam and its associated sidelobes. A perturbation phase generator portion of a phase controller adds a perturbation phase shift selected, in conjunction with a particular thinning distribution, to form a relatively wide null in the sidelobe structure, in which signal transduction is reduced. In a radar context, this null may be placed on a source of ground clutter or a jammer.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: May 7, 1996
    Assignee: Martin Marietta Corp.
    Inventors: Moayyed A. Hussain, Kai-Bor Yu, Koeunyi Bae
  • Patent number: 5302961
    Abstract: A nonrectangular antenna aperture is provided comprising four quadrants for receiving electromagnetic signals. The aperture has the capability to form a predetermined sum beam, a predetermined first difference beam, a predetermined second difference beam, and a predetermined double difference beam so that the product of the first and second difference beams is substantially equal to the product of the sum and the double difference beams.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: April 12, 1994
    Assignee: General Electric Co.
    Inventors: David J. Murrow, Kai-Bor Yu, Moayyed A. Hussain
  • Patent number: 5274384
    Abstract: An antenna beamformer is provided for coupling to a circular antenna aperture comprising a plurality of vertical beamformers and four horizontal beamformers coupled to the vertical beamformers so that each horizontal beamformer has the capability to form a different predetermined electromagnetic field radiation pattern.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: December 28, 1993
    Assignee: General Electric Company
    Inventors: Moayyed A. Hussain, Kai-Bor Yu, David J. Murrow
  • Patent number: 4646024
    Abstract: In the production of nuclear magnetic resonance images, it is necessary to provide various magnetic fields with specified orientations and configurations in particular relationships with respect to a cylindrical coil form on which the RF and gradient coils are generally disposed. In particular, it is necessary to produce so-called transverse gradient fields which are oriented transversely with respect to the cylindrical form. It is necessary to produce a component parallel to the axis of the cylinder, but which component varies linearly in intensity in the direction transverse to the axis. That is to say, it is desirable to produce a magnetic field component within the cylinder such that surfaces on which this component is constant are parallel and are generally oriented parallel to the axis of the cylinder. Furthermore, for the purpose of providing proper spatial definition and resolution, it is necessary that this transverse field exhibit a highly linear variation in intensity inside the cylinder.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: February 24, 1987
    Assignee: General Electric Company
    Inventors: John F. Schenck, Moayyed A. Hussain, William A. Edelstein