Title:
【発明の名称】空気式土壌掘削装置のトラップ装置
Document Type and Number:
Japanese Patent JP2925800
Kind Code:
B2
Inventors:
KOGA MOTOYUKI
SATO TOORU
SATO TOORU
Application Number:
JP22216991A
Publication Date:
July 28, 1999
Filing Date:
August 07, 1991
Export Citation:
Assignee:
HATSUKOO KK
International Classes:
E02F3/88; E21B7/00; E21B7/18; (IPC1-7): E21B7/18; E21B7/00
Domestic Patent References:
| JP1124896U | ||||
| JP63104484U | ||||
| JP5326801Y1 |
Attorney, Agent or Firm:
Nobuhiro Kobashi (1 outside)