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:
Jul. 18, 2017
Filed:
Jun. 13, 2016
Ricoh Company, Ltd., Ohta-ku, Tokyo, JP;
Kouta Hirakawa, Tokyo, JP;
Junichi Murano, Saitama, JP;
Shoji Asanuma, Kanagawa, JP;
Toshihiro Shimada, Tokyo, JP;
Tsuyoshi Endo, Kanagawa, JP;
Hiroki Ishimitsu, Kanagawa, JP;
Masahiro Ishida, Kanagawa, JP;
Naoki Matsuda, Kanagawa, JP;
RICOH COMPANY, LIMITED, Tokyo, JP;
Abstract
A sound absorbing device including a Helmholtz resonator having a projection part which includes a shape of protruding from an outer wall surface of a communicating part forming plate among the communicating part forming plate and a cavity forming member that are cavity part forming members forming a cavity part of the Helmholtz resonator, and surrounding an opening of a communicating part that causes the cavity part to communicate with the outside.