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:
Feb. 27, 2007
Filed:
Mar. 04, 2003
Ichiro Tamura, Utsunomiya, JP;
Tadashi Murayama, Utsunomiya, JP;
Kazuhiro Katayama, Yaita, JP;
Shuhki Ohtani, Tochigi, JP;
Ichiro Tamura, Utsunomiya, JP;
Tadashi Murayama, Utsunomiya, JP;
Kazuhiro Katayama, Yaita, JP;
Shuhki Ohtani, Tochigi, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A bass reflex type speaker apparatus comprises a speaker box having an opening portion on a front surface, a speaker unit () mounted within the speaker box in conformity with the opening portion, and a tubular duct () that externally radiates sound from a rear surface of the speaker unit () disposed within the speaker box through phase inversion. The duct () has on the same plane one or a plurality of bent portions bent in substantially dogleg form and linear portions extending at both ends of the bent portion, the duct being disposed in parallel with the front surface of the speaker box. At least the longest linear portion of the linear portions is disposed tilted relative to wall surfaces except for the front and rear surfaces of the speaker box. It is thus possible to reduce the size, namely height, width and depth, of the speaker box incorporating the duct.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile