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:
May. 04, 2004
Filed:
Jul. 30, 2002
Yoshinobu Yasuno, Tokyo, JP;
Yasuhiro Riko, Yokohama-shi, Kanagawa 226-0021, JP;
Other;
Abstract
A condenser microphone has a conductive diaphragm having an earth electrode layer formed of a conductive light metal; a conductor fixed electrode arranged opposite to the conductive diaphragm through an air layer; an organic dielectric layer formed of the organic compound provided on the boundary surface C side between the air layer and the conductive diaphragm ; and a permanent electric charge layer A composed of ions or electrons formed in the inner portion side receding from the air layer side, from a middle position in the thickness direction of the organic dielectric layer in the inside of the organic dielectric layer
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile