The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2007
Filed:
Jun. 07, 2004
Applicants:
Toshio Tanaka, Osaka, JP;
Kenkichi Kagawa, Osaka, JP;
Kanji Motegi, Osaka, JP;
Inventors:
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03C 3/40 (2006.01);
U.S. Cl.
CPC ...
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.