Patents by Inventor Wilfred A. Mead

Wilfred A. Mead 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).

  • Blood pumping system with selective backflow warning
    Patent number: 5368554
    Abstract: A blood pumping system and method in which a selective backflow warning is generated in response to the detection of a backflow condition only in the absence of electrical interference that could cause the generation of a false backflow warning. Detection of a backflow condition is performed by activating the transmitter and receiver of a flow detector to determine the direction of blood flow and detection of the electrical interference is performed by activating the receiver of the flow detector while the transmitter is not activated. If electrical interference that could cause the generation of a false backflow warning exceeds a threshold, the system does not generate a backflow warning.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: November 29, 1994
    Assignees: Minnesota Mining and Manufacturing Company, ViaSat Incorporated
    Inventors: Richard A. Nazarian, Marc H. Agnew, Daniel E. Schneider, Wilfred A. Mead