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:
Aug. 26, 2008
Filed:
Jun. 13, 2002
Yoshio Sakamoto, Hachiouji, JP;
Takahiro Imai, Kawasaki, JP;
Yoshio Sakamoto, Hachiouji, JP;
Takahiro Imai, Kawasaki, JP;
Kabushiki Kaisha Kenwood, Tokyo, JP;
Abstract
A diaphragm () of a light sound converter which has a high performance, is suitable for mass-production and has a slit () formed therein. A light emitting element and a light receiving element are disposed at positions opposed to a reflective part () of the diaphragm () having a pressure receiving surface part () and the reflective part (), and light is radiated from the light emitting element to the reflective part () of the diaphragm () and the reflected light from the reflective part () is received by the light receiving element, whereby the position of the diaphragm () can be detected.