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:
Jan. 29, 2008
Filed:
Nov. 20, 2003
Ken Iwayama, Nishinomiya, JP;
Takashi Nishino, Jakarta Timur, IN;
Ken Iwayama, Nishinomiya, JP;
Takashi Nishino, Jakarta Timur, IN;
TOA Corporation, Kobe-shi, Hyogo, JP;
Abstract
A wide dispersion speaker systemcomprises a cone type speaker unitand a restricting elementA. The restricting elementA is provided with a center holeat a center section thereof, and a peripheral holelocated outward relative to the center holeThe restricting elementA has an annular sound travel inhibiting portionpositioned radially outward relative to the center holeand radially inward relative to the peripheral holeAn outer end in a radial direction of the sound travel inhibiting portionis positioned at a substantially middle point between an outer end in the radial direction of the center holeand an outer end in the radial direction of the peripheral holeor positioned radially outward relative to the substantially middle point.