Ultrasonic non-contact motion monitoring system
Patent 5220922 Issued on June 22, 1993. Estimated Expiration Date: 
March 5, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 5, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3803539 Motion monitor Ultrasonic respiration/convulsion monitoring apparatus and method for its use Heart and breathing alarm monitor Apparatus and method for monitoring the waveform of cyclic movement within the thorax of an individual Method and apparatus for using Doppler modulation parameters for estimation of vibration amplitude Patent #: 5086775 InventorApplicationNo. 846566 filed on 03/05/1992US Classes:600/437, Ultrasonic367/94, By doppler effect367/95, Returned signal used for control600/443Anatomic image produced by reflective scanningExaminersPrimary: Howell, Kyle L.Assistant: Manuel, George Foreign Patent References
International ClassB61B 008/12AbstractAn ultrasonic non-contact motion monitoring system, useful for monitoring motional activities and such activities as respiration rate and heart beat rate. Using dual ultrasonic transducers, coherent sound waves are directed toward a moving subject. The phase frequency relationship of the reflected waves are compared to the transmitted sound waves in-phase and in phase-quadrature. The derived information, containing movement activity, is either displayed locally or sent to remote station(s) for display, processing and storage. | |
