Title:
BORING DEVICE
Document Type and Number:
Japanese Patent JPS63147082
Kind Code:
A
Inventors:
OTSUBO NORIO
Application Number:
JP29250186A
Publication Date:
June 20, 1988
Filing Date:
December 10, 1986
Export Citation:
Assignee:
OOMIC KK
FURONTO ENG KK
TONE KOJI KK
FURONTO ENG KK
TONE KOJI KK
International Classes:
E21B3/06; (IPC1-7): E21B3/06
Attorney, Agent or Firm:
Yoshihisa Nagai