Title:
【考案の名称】穿孔器
Document Type and Number:
Japanese Patent JPS6123346
Kind Code:
U
Inventors:
Yoshiaki Omoto
Application Number:
JP10654084U
Publication Date:
February 12, 1986
Filing Date:
July 13, 1984
Export Citation:
International Classes:
E21B1/00; E02F3/02; (IPC1-7): E02F3/02; E21B1/00
Domestic Patent References:
| JPS5510460U | 1980-01-23 | |||
| JPS3318845Y1 |