Ultrasonic processes and circuits for performing them
Patent 5410516 Issued on April 25, 1995. Estimated Expiration Date: 
June 14, 2013. 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.
June 14, 2013. 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 3640271 Ultrasonic measuring method Pressure measuring system with ultrasonic wave Parametric acoustic flow meter Ultrasonic non-linear parameter measuring system Methods of and systems for examining tissue perfusion using ultrasonic contrast agents Patent #: 5255683 InventorsAssigneeApplicationNo. 076221 filed on 06/14/1993US Classes:367/7ACOUSTIC IMAGE CONVERSIONExaminersPrimary: Pihulic, Daniel T.Attorney, Agent or FirmInternational ClassG01S 007/52Foreign Application Priority Data1988-09-01 DEAbstractA process for selective graphic representation and/or evaluation of the Doppler spectrum of objects limitedly resistant to sonic intensity, for example biological organs and tissues, by an ultrasonic process wherein a material is introduced in the examination area to be acoustically irradiated, nonlinear oscillations are produced in the examination area by irradiated ultrasonic waves and the signal is evaluated by an ultrasonic converter. Also, a circuit for carrying out the above process is disclosed.Other References
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