Document Type and Number:
Japanese Patent JPH0137767
Kind Code:
Y2
Application Number:
JP8837285U
Publication Date:
November 14, 1989
Filing Date:
June 11, 1985
Export Citation:
International Classes:
B21C23/08; B21C23/21; B21C25/04; (IPC1-7): B21C23/21; B21C25/04
Next Patent: JPH0137768