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:
Nov. 08, 1983
Filed:
Mar. 12, 1982
Harumitsu Kato, Hachioji, JP;
Hironori Yamada, Hidaka, JP;
Kaoru Yamazaki, Akigawa, JP;
Masashi Maruyama, Iruma, JP;
Takashi Ogasawara, Seki, JP;
Trio Kabushiki Kaisha, Tokyo, JP;
Abstract
A bass-reflex type speaker system having a cabinet including a front baffle board, a back panel and two side panels and a speaker mounted on the front panel. A port is disposed in either the back panel or in one of the side panels and a duct is in communication with the port. The back panel may be flat or have a generally triangular cross-sectional configuration where the apex of the triangle is directed toward the speaker. Further, the speaker may be positioned in the approximate center of the front baffle board and the port positioned at the apex of the back panel. A beam may be provided extending across and spaced from the port, the beam having a triangular shaped tip directed toward and spaced from the port.