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:
Jun. 21, 1977
Filed:
Oct. 30, 1975
Applicant:
Inventor:
Tadasi Itagaki, Tokorozawa, JA;
Assignees:
Pioneer Electronic Corporation, Tokyo, JA;
Tokorozawa Electronic Corporation, Tokorozawa, JA;
Primary Examiner:
Int. Cl.
CPC ...
G10K / ; H04R / ; H04R / ;
U.S. Cl.
CPC ...
181166 ; 179180 ; 181158 ; 181160 ;
Abstract
A loud speaker having air communicating holes within the rear portion of the frame and facing the diaphragm is provided with regularly woven wire gauze formed of warp and weft wire threads of different diameter, which gauze covers the communicating holes to obtain a stable vibration damping effect.