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:
Oct. 28, 2025
Filed:
Apr. 02, 2020
Nitto Denko Corporation, Ibaraki, JP;
The School Corporation Kansai University, Suita, JP;
Kohei Oto, Osaka, JP;
Yusuke Komoto, Osaka, JP;
Ryohei Oban, Osaka, JP;
Saori Yamamoto, Osaka, JP;
Yoshinobu Kajikawa, Osaka, JP;
Shun Hirose, Osaka, JP;
NITTO DENKO CORPORATION, Osaka, JP;
THE SCHOOL CORPORATION KANSAI UNIVERSITY, Osaka, JP;
Abstract
A speaker () includes a radiation surface (). The radiation surface () has a first region (), a second region (), and a third region () between the first region () and the second region (). When an axis passing through the third region () and extending away from the radiation surface () is defined as a reference axis (X), the speaker () forms a first wavefront () propagating from the first region so as to approach the reference axis (X) and a second wavefront () propagating from the second region () so as to approach the reference axis (X).