Title:
【発明の名称】超微細組織を有する継目無鋼管の製造法
Document Type and Number:
Japanese Patent JP2576254
Kind Code:
B2
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Inventors:
HAYASHI CHIHIRO
YAMAKAWA TOMIO
YAMAKAWA TOMIO
Application Number:
JP3462790A
Publication Date:
January 29, 1997
Filing Date:
February 15, 1990
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
B21B19/02; C21D8/10; B21B19/04; B21B19/06; B21B23/00; (IPC1-7): C21D8/10; B21B19/02
Domestic Patent References:
| JP5445618A | ||||
| JP644423A | ||||
| JP6244523A |
Attorney, Agent or Firm:
Takeshi Imai