Title:
防音装置および加工装置
Document Type and Number:
Japanese Patent JP4505571
Kind Code:
B1
Inventors:
Akio Kamishima
Application Number:
JP2009274627A
Publication Date:
July 21, 2010
Filing Date:
December 02, 2009
Export Citation:
Assignee:
Kamijima Gumi Co., Ltd.
International Classes:
E21B12/00; E21B15/00
Domestic Patent References:
| JP2002533597A | ||||
| JP2009084812A | ||||
| JP2006022568A | ||||
| JP57193735U | ||||
| JP56083388U |
Attorney, Agent or Firm:
Kakusho Shoichi
Ryose Uji
Ryose Uji