Patents by Inventor David A. Brent

David A. Brent 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: 8587469
    Abstract: A metamaterial for a radio frequency communications apparatus is disclosed. The metamaterial can comprise a flex circuit and an array of circuit elements mounted on the flex circuit. Each of the circuit elements can comprise a conductive trace and at least one hybrid component electrically coupled to the conductive trace.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: November 19, 2013
    Assignee: Northrop Grumman Systems Corporation
    Inventors: William M. Bruno, Dwight L. Ritums, David A. Brent
  • Publication number: 20120235848
    Abstract: A metamaterial for a radio frequency communications apparatus is disclosed. The metamaterial can comprise a flex circuit and an array of circuit elements mounted on the flex circuit. Each of the circuit elements can comprise a conductive trace and at least one hybrid component electrically coupled to the conductive trace.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 20, 2012
    Inventors: WILLIAM M. BRUNO, Dwight L. Ritums, David A. Brent
  • Patent number: 5124125
    Abstract: A method for microwave sterilization and densification of infectious waste wherein a supply of infectious waste to be sterilized and disposed of is provided which includes at least 20% by weight of plastic materials. A selected portion of the infectious waste is placed into a pressure vessel of a microwave sterilizer and then the sterilizer is sealed. A selected amount of water is then introduced into the sealed pressure vessel to facilitate treatment of the infectious waste contained therein, and the microwave sterilizer is actuated in order to transform the water in the pressure vessel into steam to elevate the temperature within the pressure vessel to at least 150.degree. C. and the pressure to at least 54 p.s.i.g. The infectious waste within the pressure vessel is sterilized and then densified by melting the plastic materials contained therein to form a unitary mass of reduced volume wherein the melted plastic substantially encases the residual sterilized infectious waste components.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: June 23, 1992
    Inventor: David A. Brent