Title:
【発明の名称】穿孔方法
Document Type and Number:
Japanese Patent JP2892123
Kind Code:
B2
Inventors:
OOMI KATSUHEI
Application Number:
JP21962590A
Publication Date:
May 17, 1999
Filing Date:
August 20, 1990
Export Citation:
Assignee:
OOMI KOGYO KK
International Classes:
E21B25/00; B23B47/34; B23Q11/00; B28D1/14; B28D7/02; E04G23/08; E21B21/00; (IPC1-7): B28D1/14; B23B47/34; B23Q11/00; B28D7/02; E21B25/00; E21C7/04
Domestic Patent References:
| JP222008A | ||||
| JP34229B1 |
Attorney, Agent or Firm:
Hironobu Onda (1 person outside)