Ultrasonic medical treatment apparatus
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United States of America Patent
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Apr 28, 1998
Grant Date -
N/A
app pub date -
Sep 15, 1995
filing date -
Sep 19, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An applicator includes a concave piezoelectric oscillator. The concave piezoelectric oscillator comprises a plurality of piezoelectric oscillation plates having equal areas. Each piezoelectric oscillation plate comprises a plurality of piezoelectric oscillator elements. Each piezoelectric oscillator element has a higher resonance frequency in the lateral direction thereof than in the thickness direction thereof.
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