Title:
【発明の名称】さく岩用工具及びさく岩方法
Document Type and Number:
Japanese Patent JP2859816
Kind Code:
B2
Inventors:
INAGE MASAAKI
EGUCHI TAKUMI
EGUCHI TAKUMI
Application Number:
JP21209794A
Publication Date:
February 24, 1999
Filing Date:
August 12, 1994
Export Citation:
Assignee:
MITSUI KENSETSU KK
KOKEN KOGYO KK
KOKEN KOGYO KK
International Classes:
E21B19/24; E21B3/00; E21B6/02; E21C37/00; (IPC1-7): E21C9/00; E21C1/12
Domestic Patent References:
| JP61165490A | ||||
| JP1322087A | ||||
| JP62248795A | ||||
| JP3140591A |
Attorney, Agent or Firm:
Youichi Oshima