Title:
継目無管製造用リーラープラグ
Document Type and Number:
Japanese Patent JP4704798
Kind Code:
B2
Inventors:
Tetsuya Yokoyama
Kenji Ikai
High Tatsuo Oka
Katsuhiro Miyamoto
Kenji Ikai
High Tatsuo Oka
Katsuhiro Miyamoto
Application Number:
JP2005120264A
Publication Date:
June 22, 2011
Filing Date:
April 18, 2005
Export Citation:
Assignee:
NKK Seamless Steel Pipe Co., Ltd.
International Classes:
B21B25/00; B21B19/10; C22C37/00
Domestic Patent References:
| JP60127008A | ||||
| JP63259049A | ||||
| JP5212416A |
Attorney, Agent or Firm:
Tadao Hirata