Title:
常用井戸、常用井戸の構築方法及び常用井戸の構造
Document Type and Number:
Japanese Patent JP5320728
Kind Code:
B2
Inventors:
Yoshihiko Morio
Takayuki Ueno
Kiyohiro
Takayuki Ueno
Kiyohiro
Application Number:
JP2007293547A
Publication Date:
October 23, 2013
Filing Date:
November 12, 2007
Export Citation:
Assignee:
Obayashi Corporation
International Classes:
E02D19/10; E03B3/08; E21B43/00
Domestic Patent References:
| JP2002138461A | ||||
| JP62117911A | ||||
| JP2004003286A | ||||
| JP11269869A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation