Title:
A torsion processing method and a device of a metal tube
Document Type and Number:
Japanese Patent JP6144516
Kind Code:
B2
Inventors:
Shotaro Sano
Shigeo Yura
Kenjiro Yamamoto
Shigeo Yura
Kenjiro Yamamoto
Application Number:
JP2013069577A
Publication Date:
June 07, 2017
Filing Date:
March 28, 2013
Export Citation:
Assignee:
Nittetsu Sumikin Building Materials Co., Ltd.
International Classes:
B21D11/14
Domestic Patent References:
JP58196124A | ||||
JP57142715A | ||||
JP61259838A | ||||
JP7080556A | ||||
JP48102285A |
Foreign References:
US3533267 |
Attorney, Agent or Firm:
Yasuhiko