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. 10, 2008
Filed:
Feb. 15, 2005
Applicants:
Teruho Yamada, Tokyo, JP;
Masahiko Kawahara, Osaka, JP;
Yukio Sugimoto, Shizuoka, JP;
Seiji Mori, Tokyo, JP;
Toshikazu Iwasaki, Tokyo, JP;
Inventors:
Teruho Yamada, Tokyo, JP;
Masahiko Kawahara, Osaka, JP;
Yukio Sugimoto, Shizuoka, JP;
Seiji Mori, Tokyo, JP;
Toshikazu Iwasaki, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A liquefied paper material is used as raw materials. A paper frame membersupporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release holereleasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member