Document Type and Number:
Japanese Patent JPH0156847
Kind Code:
B2
Inventors:
YAMAMOTO HIROYASU
NAKAYAMA TADASHI
NOZAWA TADAO
NAKAYAMA TADASHI
NOZAWA TADAO
Application Number:
JP15174782A
Publication Date:
December 01, 1989
Filing Date:
September 02, 1982
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B21D13/04; C22C38/04; H01F1/16
Next Patent: JPH0156848