Title:
【発明の名称】アースオーガ装置
Document Type and Number:
Japanese Patent JP2727267
Kind Code:
B2
Inventors:
MASUDA ISATO
OOGANE HIROAKI
UZAWA NOBUO
OOGANE HIROAKI
UZAWA NOBUO
Application Number:
JP30978191A
Publication Date:
March 11, 1998
Filing Date:
October 29, 1991
Export Citation:
Assignee:
HITACHI KENKI KK
International Classes:
F16J15/10; E21B3/02; E21B3/035; (IPC1-7): E21B3/02
Attorney, Agent or Firm:
Kazuhiko Hirose