Ultrasonic probe
Patent 5115809 Issued on May 26, 1992. Estimated Expiration Date: 
March 29, 2010. 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 29, 2010. 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.InventorsApplicationNo. 500945 filed on 03/29/1990US Classes:600/459, Structure of transducer or probe assembly310/334Acoustic wave type generator or receiverExaminersPrimary: Kamm, William E.Assistant: Pontius, Kevin Attorney, Agent or FirmForeign Patent References
International ClassA61B 008/14Foreign Application Priority Data1989-03-31 JPAbstractAn ultrasonic probe includes a probe head having a piezoelectric element which includes a plurality of piezoelectric layers which are laminated in the thickness direction thereof with the polarity directions of the adjacent piezoelectric layers set opposite to each other and each of which has opposite end surfaces, electrodes formed on the opposite end surfaces of the piezoelectric layers in the laminated direction, a plurality of external electrodes formed on the opposite end surfaces of the piezoelectric layers on the laminated direction, internal electrodes formed in the lamination interface of the piezoelectric layers, an acoustic matching layer having a plurality of layers and formed on one surface of the plurality of laminated piezoelectric layers, an acoustic lens disposed on the matching layer with the convex surface thereof set towards the outside, and a backing material disposed on the other surface of the piezoelectric element.Other References
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