Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2008-08-25
2011-11-01
Benson, Walter (Department: 2837)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C310S311000
Reexamination Certificate
active
08047995
ABSTRACT:
A ultrasonic transducer of the invention comprises: a transducer cell including a first electrode and a second electrode disposed separated from the first electrode by an air gap portion; and an electret for applying a potential difference between the first electrode and the second electrode. The electret is disposed in a region where at least a part thereof does not overlap with the transducer cell when viewed from a transmitting direction of ultrasonic waves.
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Adachi Hideo
Hasegawa Mamoru
Kamiya Yoshitaka
Karaki Kazuhisa
Matsumoto Kazuya
Addison Karen B
Benson Walter
Olympus Corporation
Olympus Medical Systems Corp.
Scully , Scott, Murphy & Presser, P.C.
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