Title:
【考案の名称】ボーリング用アウタービットの構造
Document Type and Number:
Japanese Patent JP2560502
Kind Code:
Y2
Inventors:
Nobuhiko Matsui
Application Number:
JP6082091U
Publication Date:
January 26, 1998
Filing Date:
August 01, 1991
Export Citation:
Assignee:
Wako Co., Ltd.
International Classes:
E21B10/02; E21B1/00; E21B3/00; (IPC1-7): E21B10/02
Attorney, Agent or Firm:
Toshitada Takahashi (1 outside)