Title:
【発明の名称】鋼管穿孔機用プラグ
Document Type and Number:
Japanese Patent JP2581154
Kind Code:
B2
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Inventors:
TSUBOCHI KENJI
Application Number:
JP11989688A
Publication Date:
February 12, 1997
Filing Date:
May 16, 1988
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
B21B25/00; B21B19/04; (IPC1-7): B21B25/00
Domestic Patent References:
| JP62207503A | ||||
| JP6347003U |
Attorney, Agent or Firm:
Terutaka Hogami (1 person outside)