Title:
DEVICE FOR VANISHING INTERNAL SURFACE OF CIRCULAR HOLE
Document Type and Number:
Japanese Patent JPS5238457
Kind Code:
A
Inventors:
YOKOTE HISAO
Application Number:
JP11532275A
Publication Date:
March 25, 1977
Filing Date:
September 22, 1975
Export Citation:
Assignee:
YOKOTE TETSUKOUSHIYO YUUGEN
International Classes:
B21D3/14; B23B41/00; B23P9/00; B24B39/00; B24B39/02; C21D7/08; (IPC1-7): B23B41/00; B23P9/00; B24B39/00; C21D7/08
Domestic Patent References:
| JPS5017118U | 1975-02-24 |