Document Type and Number:
Japanese Patent JPS4990668
Kind Code:
A
Application Number:
JP166573A
Publication Date:
August 29, 1974
Filing Date:
December 29, 1972
Export Citation:
International Classes:
B21D22/28
Domestic Patent References:
| JP47082261A | ||||
| JPS4938733B1 | 1974-10-19 |