Title:
【発明の名称】さく孔機の制御装置
Document Type and Number:
Japanese Patent JPH0631522
Kind Code:
B2
Inventors:
YOSHIDA AKIRA
Application Number:
JP29502385A
Publication Date:
April 27, 1994
Filing Date:
December 27, 1985
Export Citation:
Assignee:
FURUKAWA CO LTD
International Classes:
E21B1/26; E21B1/00; (IPC1-7): E21C3/20
Domestic Patent References:
| JP5539528A |
Attorney, Agent or Firm:
Tetsuya Mori (2 others)