Title:
掘削用ビット及びケーシングカッタ
Document Type and Number:
Japanese Patent JP4485705
Kind Code:
B2
Inventors:
Endo Atsushi
Application Number:
JP2001122391A
Publication Date:
June 23, 2010
Filing Date:
April 20, 2001
Export Citation:
Assignee:
Tungaloy Co., Ltd.
International Classes:
E21B10/46; E21B17/14
Domestic Patent References:
| JP11311082A | ||||
| JP7091932B2 | ||||
| JP7026477Y2 | ||||
| JP8333978A |