Patents by Inventor Jan Grabs

Jan Grabs 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).

  • Repeater jamming transmitter and casing for the same
    Patent number: 6384765
    Abstract: This invention concerns a repeater jamming transmitter (2), and a casing arrangement with repeater jamming transmitter. The repeater jamming transmitter (2) comprises transmitter antenna (7), receiver antenna (8) and electronics part (10) with amplifier and control circuits. In order to avoid self-oscillation caused by leakage between the transmitter antenna (7) and the receiver antenna (8) and to maintain the isolation a special connection arrangement (7,8,10) is included in the repeater jamming transmitter. By means of the connection arrangement the amplification of the repeater jamming transmitter can be increased without self-oscillation arising.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: May 7, 2002
    Assignee: Celsiustech Electronics AB
    Inventors: Per Sjöstrand, Jan Grabs, Alf Näsvall
  • Device for controlling a magnetron filament current based on detected dynamic impedance
    Patent number: 6204601
    Abstract: The present invention refers to a method for controlling a magnetron filament current. The control is provided by detecting the dynamic impedance or a noise level of the magnetron and by controlling the magnetron filament current based thereupon.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: March 20, 2001
    Assignee: Fusion Lighting, Inc.
    Inventors: Kjell Lidström, Jan Grabs