Patents Represented by Attorney J. C. Holman

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  • Medical needle for use in ultrasound imaging and method of enhancing the visibility of such a needle to ultrasound
    Patent number: 5549112
    Abstract: A needle inserted into body tissue is rendered visible to a Doppler ultrasound imager by generating a longitudinal oscillation of the fluid column in the needle barrel by means of a transducer which is energized by a signal of frequency 100 Hz to 2 kHz, for example. An image of the needle tip is displayed on a screen.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: August 27, 1996
    Inventors: John F. Cockburn, Donald Cockburn