Patents by Inventor Mark A. Laing

Mark A. Laing 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).

  • Method of testing continuity of a connection between an integrated circuit and a printed circuit board by current probing integrated circuit
    Patent number: 5399975
    Abstract: A method of testing the electrical conductivity of a connection between an integrated circuit device (9) and a circuit board (7) to which the device (9) is connected. The device (9) includes a current path between a further connection (13) thereto and the connection (15) to be tested. The method comprises the steps of, while the circuit is inoperative: applying via the board (8) a potential of a first amount to the further connection (13); applying via the board (7) a potential of a second different amount to the connection (15) being tested; and positioning a probe adjacent the device (9) to sense indirectly current in the current path, the presence of current indicating that the connection (15) being tested is conductive.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: March 21, 1995
    Assignee: Marconi Instruments Limited
    Inventors: Mark A. Laing, Robert J. Williams