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:
May. 25, 2004
Filed:
Mar. 29, 2002
Applicant:
Inventors:
Toshihiro Ishigaki, Yamagata-ken, JP;
Hideo Sekikawa, Yamagata-ken, JP;
Koji Maekawa, Yamagata-ken, JP;
Tomoyuki Shimada, Kanagawa-ken, JP;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
D21H 3/12 ;
U.S. Cl.
CPC ...
D21H 3/12 ;
Abstract
A speaker diaphragm is formed from a material combining a fiber-type material and a ceramic-type-coating agent including metal alkoxide, metal hydroxide, and a colloidal or fine-particulate inorganic substance. The combining process for the ceramic-type-coating agent is performed before or after the fiber-type material is formed into a shape of the diaphragm.