Patents by Inventor Thomas R. Krishan

Thomas R. Krishan 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).

  • Multifrequency antenna having a DC power path
    Patent number: 4989013
    Abstract: A plural frequency antenna includes a plurality of antenna segment pairs, one for each frequency which is to be transmitted. The segment pairs are serially connected to one another and form a conductive path for DC current which charges a capacitor used to fire a strobe lamp mounted on the top of the antenna.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: January 29, 1991
    Assignee: Litton Systems, Inc.
    Inventors: Frank P. Smith, II, Thomas R. Krishan, Hugh P. McAdams, Jr.
  • Emergency transmitter buoy and bracket assembly
    Patent number: 4981453
    Abstract: An emergency position indicating radio beacon is controlled by an annular switch ring which rotates to ON, OFF, SET, and TEST positions. In the SET position, the buoy transmitter automatically turns on in response to removal of the buoy from a mounting bracket. A light and an audible alarm on the buoy are activated during buoy transmission to alert an operator to the transmission in order to avoid false alarms. The mounting bracket automatically releases and ejects the buoy in an emergency situation in response to ambient water pressure, or the buoy may be manually removed from the bracket for deployment.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: January 1, 1991
    Assignee: Litton Systems, Inc.
    Inventors: Thomas R. Krishan, Peter W. Bressler, Harry F. Buschmeier, III, Fernando M. Guidone, Eugene F. Keohane, Robert J. Malloy, Albert C. Paulovitz, David R. Schiff, Nicholas M. Tinari, Jr., John G. Vattima
  • Transmitter buoy
    Patent number: D319799
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: September 10, 1991
    Assignee: Litton Systems, Inc.
    Inventors: Thomas R. Krishan, Peter W. Bressler, Eric A. Schneider, Fernando M. Guidone, Albert C. Paulovitz, William M. Gorman
  • Combined transmitter buoy and bracket therefor
    Patent number: D320950
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: October 22, 1991
    Assignee: Litton Systems, Inc.
    Inventors: Peter W. Bressler, Albert C. Paulowitz, David R. Schiff, Thomas R. Krishan