06183426 is referenced by 195 patents and cites 11 patents.

An ultrasonic wave applying apparatus which is safe and convenient for use. The apparatus includes an hand-held applicator having a vibration element which is, in use, contact with a skin of a user to apply ultrasonic waves to the skin, a power source providing a DC voltage, an oscillator circuit which is energized by the DC voltage from the power source to generate an oscillating output for driving the vibration element, and a load detecting circuit which monitors whether the vibration element is loaded such as by contact with the skin and provides a load detection signal when the vibration element is so loaded. In addition, a motion detecting circuit is provided to monitor whether the vibration element is moving and give a motion detection signal when the vibration element is so moving. A control circuit is connected to the load detecting circuit and the motion detecting circuit for controlling the driving circuit to reduce the oscillating output being fed to the ultrasonic vibration element when the load detection signal is not received within a predetermined first time period or when the motion detection signal is not continuous over a critical time duration within a predetermined second time period even in the presence of the load detection signal being detected within the first time period.

Title
Ultrasonic wave applying apparatus
Application Number
9/147391
Publication Number
6183426 (B2)
Application Date
December 15, 1998
Publication Date
February 6, 2001
Inventor
Itaru Saida
Hikone
US
Shinji Nishimura
Hikone
US
Masayuki Hayashi
Hikone
US
Motoharu Muto
Osaka
US
Kozo Kawai
Neyagawa
US
Hideaki Abe
Neyagawa
US
Hiromitu Inoue
Kyoto
US
Shosuke Akisada
Shijonawate
US
Agent
Arent Fox Kintner Plotkin & Kahn PLLC
US
Assignee
Matsushita Electric Works
US
IPC
A61H 1/00
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