Title:
トンネル掘削機のカッタヘッド
Document Type and Number:
Japanese Patent JP4390553
Kind Code:
B2
Inventors:
Takayoshi Nakayama
Naori Hoshino
Tetsuya Yokoyama
Naori Hoshino
Tetsuya Yokoyama
Application Number:
JP2003430255A
Publication Date:
December 24, 2009
Filing Date:
December 25, 2003
Export Citation:
Assignee:
Okumura Gumi Co., Ltd.
International Classes:
E21D1/06; E21D9/087
Domestic Patent References:
| JP2003336488A | ||||
| JP6235288A | ||||
| JP2002129886A | ||||
| JP9177484A |
Attorney, Agent or Firm:
Takuya Yamamoto