Title:
【考案の名称】掘削機械の深掘り警報装置
Document Type and Number:
Japanese Patent JP2537525
Kind Code:
Y2
Inventors:
Nobuaki Matoba
Tamura Manabu
Yoshihiro Kuge
Tamura Manabu
Yoshihiro Kuge
Application Number:
JP5510091U
Publication Date:
June 04, 1997
Filing Date:
July 16, 1991
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
E21B11/00; E21B41/00; E21B47/04; (IPC1-7): E21B41/00; E21B47/04
Attorney, Agent or Firm:
Shigefumi Okamoto (1 person outside)