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. 23, 1988
Filed:
Oct. 03, 1985
Applicant:
Inventors:
Masana Ugaji, Tokyo, JP;
Shinichi Watanabe, Chiba, JP;
Hiroyuki Sogawa, Kanagawa, JP;
Nobuo Fuke, Kanagawa, JP;
Masatsugu Maejima, Tokyo, JP;
Koichi Saruwatari, Tokyo, JP;
Assignee:
Sony Corporation and Fujikura Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10K / ; H04R / ;
U.S. Cl.
CPC ...
181167 ; 181168 ; 4283155 ;
Abstract
A diaphragm using a metal material applied with anodic oxide films, in which said metal material contains one of lead compounds, inorganic metal compounds and phosphor compounds at least to a portion in the micropores of the anodic oxide film.