Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kanji Motegi0
Kenkichi Kagawa0
Toshio Tanaka0
Date of Patent
September 18, 2007
0Patent Application Number
105258680
Date Filed
June 7, 2004
0Patent Primary Examiner
Patent abstract
The distance between a discharge electrode and a counter electrode of a discharge device is set to not more than 10 mm such that a streamer discharge is caused between the electrodes. The frequency of sound made by the streamer discharge is raised to 6 kHz or higher to exceed the frequency range which is easily perceivable by human hearing.
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