Title:
【発明の名称】メーソンリードリルビットおよび挿入方法
Document Type and Number:
Japanese Patent JPH11512976
Kind Code:
A
Inventors:
Simk, Thomas Oh
Application Number:
JP50137897A
Publication Date:
November 09, 1999
Filing Date:
June 04, 1996
Export Citation:
Assignee:
Vermont American Corporation
International Classes:
B23B51/00; B23P15/32; E21B10/44; E21B10/58; (IPC1-7): B23B51/00; B23P15/32; E21B10/58
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)