Title:
DRILLING MACHINE
Document Type and Number:
Japanese Patent JPS59150894
Kind Code:
A
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Inventors:
YOSHIKAWA TADAO
ITONAGA HIROSHI
ITONAGA HIROSHI
Application Number:
JP2523983A
Publication Date:
August 29, 1984
Filing Date:
February 16, 1983
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
E21D9/10; E21B6/00; E21B6/02; (IPC1-7): E21B6/00; E21D9/10
Domestic Patent References:
| JP50049924B | ||||
| JP56168598B |
Attorney, Agent or Firm:
Yoshihiro Morimoto