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  • Physiological sensing device
    Patent number: 6491647
    Abstract: The present invention relates to a non-invasive device for measuring physiological processes. More particularly, it concerns a device that can be applied externally to the body of an animal or human to detect and quantify displacement, force, motion, vibration and acoustic effects resulting from internal biological functions. Specifically, an inexpensive device is disclosed that is compact, light, portable and comfortable, and operates satisfactorily even with imprecise location on the body, ambient noise, motion and light.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: December 10, 2002
    Assignee: Active Signal Technologies, Inc.
    Inventors: Keith Bridger, Arthur V. Cooke, Philip M. Kuhn, Joseph J. Lutian, Edward J. Passaro, John M. Sewell, Terence V. Waskey, Gregg R. Rubin