Title:
【発明の名称】圧密式スリットカッタ
Document Type and Number:
Japanese Patent JP2552904
Kind Code:
B2
More Like This:
| JPS5922876 | [Title of the Invention] Rotary drives, such as a reverse circulation drill |
| JP3502360 | EARTH DRILL |
| WO/2023/183989 | MICROTUNNELING APPARATUS |
Inventors:
HATAKEYAMA OSAMU
Application Number:
JP17172588A
Publication Date:
November 13, 1996
Filing Date:
July 12, 1988
Export Citation:
Assignee:
HAZAMA GUMI
International Classes:
E21B3/04; E21D9/04; (IPC1-7): E21D9/04
Domestic Patent References:
| JP6019897A | ||||
| JP6180891U |
Attorney, Agent or Firm:
Hajime Sakai (1 person outside)