Title:
【発明の名称】溶接管の製造方法
Document Type and Number:
Japanese Patent JP2666647
Kind Code:
B2
Inventors:
Hiroyuki Yoshikawa
Application Number:
JP4043792A
Publication Date:
October 22, 1997
Filing Date:
January 29, 1992
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21C37/08; B23K9/025; B23K9/127; B23K9/173; B23K13/00; B23K28/02; (IPC1-7): B23K9/025; B21C37/08; B23K9/173; B23K13/00; B23K28/02
Domestic Patent References:
| JP623879A |
Attorney, Agent or Firm:
Tono Kono