【考案の名称】ドリル芯ずれ防止具

Title:

【考案の名称】ドリル芯ずれ防止具

Document Type and Number:

Japanese Patent JPH0661407

Kind Code:

U

Inventors:

Tsurumaki Tomio
Kobayashi Kazuo
Kito Tomiyuki
Minoru Nemoto
Yasuo Unemoto
Akira Yanagihara

Application Number:

JP184193U

Publication Date:

August 30, 1994

Filing Date:

January 27, 1993

Export Citation:

Assignee:

Nippon Steel Tube Co., Ltd.
Nippon Steel Pipe Construction Co., Ltd.

International Classes:

B23B41/08; B23B49/00; (IPC1-7): B23B41/08; B23B49/00

Domestic Patent References:

Attorney, Agent or Firm:

Tsutomu Toyama (2 outside)

Next Patent: SURFACE MOUNT TYPE SEMICONDUCTOR DEVICE