Title:
クローラドリルのブーム装置
Document Type and Number:
Japanese Patent JP4413312
Kind Code:
B2
Inventors:
Tsutomu Kaneko
Application Number:
JP11260799A
Publication Date:
February 10, 2010
Filing Date:
April 20, 1999
Export Citation:
Assignee:
Furukawa Metal Co., Ltd.
International Classes:
E21B15/04; E21B7/02; E21B7/04; E21B15/00; E21B19/08
Domestic Patent References:
| JP53036329Y2 | ||||
| JP62039195Y2 | ||||
| JP63005092U | ||||
| JP8100438A | ||||
| JP26005303Y1 | ||||
| JP2101285A |
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu
Tadayuki Miyazaki
Yoshiaki Naito
Cui Shu Tetsu
Tadayuki Miyazaki