Title:
改良型ダブルコアチューブ・サンプラー
Document Type and Number:
Japanese Patent JP4002228
Kind Code:
B2
Inventors:
Takayuki Hosono
Masataka Kobayashi
Daisuke Nagaoka
Masataka Kobayashi
Daisuke Nagaoka
Application Number:
JP2003345214A
Publication Date:
October 31, 2007
Filing Date:
October 03, 2003
Export Citation:
Assignee:
Takayuki Hosono
Masataka Kobayashi
Daisuke Nagaoka
Masataka Kobayashi
Daisuke Nagaoka
International Classes:
E21B25/00; E02D1/04; E21B25/10
Domestic Patent References:
| JP2002349176A | ||||
| JP7290444A | ||||
| JP52161688U | ||||
| JP9072184A |
Attorney, Agent or Firm:
Seiji Sugiyama