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, 1988
Filed:
Oct. 18, 1985
Applicant:
Inventor:
Yoshihiro Kobayashi, Tokyo, JP;
Assignee:
Trio Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ; H04R / ;
U.S. Cl.
CPC ...
381195 ; 381 96 ; 381192 ; 381194 ; 381199 ; 381201 ;
Abstract
A speaker unit having a pair of voice coils each wound around a common coil bobbin and a first magnet for driving one coil of the pair of voice coils. A second magnet is provided for suppressing flux leakage of the first magnet and driving one coil of the pair of voice coils.