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:
Mar. 09, 2021
Filed:
May. 27, 2020
Applicants:
Masahiro Ishida, Kanagawa, JP;
Naoki Matsuda, Kanagawa, JP;
Inventors:
Masahiro Ishida, Kanagawa, JP;
Naoki Matsuda, Kanagawa, JP;
Assignee:
Ricoh Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/00 (2006.01); G10K 11/00 (2006.01); B41J 29/08 (2006.01); G03G 21/16 (2006.01); G10K 11/172 (2006.01); B41J 29/02 (2006.01); B41J 29/13 (2006.01);
U.S. Cl.
CPC ...
G10K 11/002 (2013.01); B41J 29/02 (2013.01); B41J 29/08 (2013.01); B41J 29/13 (2013.01); G03G 21/1619 (2013.01); G10K 11/172 (2013.01);
Abstract
A sound absorbing device includes: a plurality of sound absorbing units. A frequency of sound absorbed by at least one of the sound absorbing units overlaps, at least partially, with a frequency of sound with a volume increased by installation of another sound absorbing unit.