Title:
Perforated sound absorbing board
Document Type and Number:
Japanese Patent JP6352336
Kind Code:
B2
Abstract:
A perforated sound-absorbing plate includes a perforated plate as a base material in which a large number of through holes are formed. A coating film is provided on an inner wall surface of the through hole, and a through-hole portion whose volume is smaller than a volume of the through hole is formed by the coating film.
Inventors:
Zenzo Yamaguchi
Juichi Yamagiwa
Juichi Yamagiwa
Application Number:
JP2016120172A
Publication Date:
July 04, 2018
Filing Date:
June 16, 2016
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
G10K11/16; E01F8/00; E04B1/86
Domestic Patent References:
| JP60123000U | ||||
| JP58088700U | ||||
| JP2001132132A |
Foreign References:
| US6206136 |
Attorney, Agent or Firm:
Kaji/Suhara Patent Office