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. 21, 2025
Filed:
Feb. 09, 2023
Alps Alpine Co., Ltd., Tokyo, JP;
Hiroki Toita, Fukushima, JP;
Yusuke Yoshida, Fukushima, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
A speaker includes a diaphragm having a perfectly circular hole in which a bobbin is attached and an oval or elliptical outer peripheral end. The diaphragm includes a perfectly circular cross-sectional area in the range of a predetermined height above a base having the perfectly circular hole. The diaphragm further includes an intermediate area whose outer surface has a small curvature radius above the perfectly circular cross-sectional area and an expanded area that is oval in cross section above the intermediate area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile