Title:
削孔装置
Document Type and Number:
Japanese Patent JP4887396
Kind Code:
B2
Inventors:
Yoshiharu Sakagami
Application Number:
JP2009123593A
Publication Date:
February 29, 2012
Filing Date:
May 21, 2009
Export Citation:
Assignee:
Seiwa Renewal Works Co., Ltd.
International Classes:
E21B7/02; E04G23/02; E04G23/08
Domestic Patent References:
| JP53109706U | ||||
| JP1178696A | ||||
| JP11117656A | ||||
| JP2008025163A | ||||
| JP7054571A | ||||
| JP5318457A | ||||
| JP11343743A | ||||
| JP56039288A | ||||
| JP2132290A |
Foreign References:
| EP1291488A1 |
Attorney, Agent or Firm:
Isono Dozo
Etsuo Tada
Etsuo Tada