Title:
外周部に凹凸による螺旋模様を有する外周円形材の製造装置及び製造方法
Document Type and Number:
Japanese Patent JP4008558
Kind Code:
B2
Inventors:
Yano Sadahide
Application Number:
JP2223598A
Publication Date:
November 14, 2007
Filing Date:
February 03, 1998
Export Citation:
Assignee:
Yano Engineering Co., Ltd.
International Classes:
B21C23/08; B21H3/00
Domestic Patent References:
| JP50148273A | ||||
| JP2236081A |
Attorney, Agent or Firm:
Hisayoshi Shimizu
Ken Takada
Kurose Yasuhisa
Ken Takada
Kurose Yasuhisa