Surgery – Instruments – Cutting – puncturing or piercing
Reexamination Certificate
2011-01-18
2011-01-18
Woo, Julian W (Department: 3773)
Surgery
Instruments
Cutting, puncturing or piercing
C310S316010, C310S317000, C323S212000, C323S219000
Reexamination Certificate
active
07871420
ABSTRACT:
A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting voltage and current supplied to the transducer.
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Anderson David L.
Elsen Nate G.
Fellinger Michael W.
Mehta Pravin V.
Abbott Medical Optics Inc.
Templeton Christopher L
Woo Julian W
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