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:
Apr. 26, 2022
Filed:
Oct. 03, 2019
Applicant:
Foster Electric Company, Limited, Tokyo, JP;
Inventor:
Hisami Kajiwara, Tokyo, JP;
Assignee:
FOSTER ELECTRIC COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 7/12 (2006.01); H04R 31/00 (2006.01);
U.S. Cl.
CPC ...
H04R 7/12 (2013.01); H04R 31/003 (2013.01); H04R 2307/021 (2013.01); H04R 2307/023 (2013.01); H04R 2307/029 (2013.01); H04R 2499/13 (2013.01);
Abstract
In a diaphragm, at a front surface side surface layer of a base materialmade of pulpswhich are mainly composed of cellulose, a mixed layerin which the pulps, mica, and cellulose nanofibersare mixed is formed.