Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8264374 | Wireless data transmitting and receiving system | Takayoshi Obatake, Toshihiko Kushida, Tatsuo Hirai | 2012-09-11 |
| 7886635 | Bolt or nut tightening device | Tatsuo Hirai | 2011-02-15 |
| 7757587 | Bolt or nut tightening device | Tatsuo Hirai | 2010-07-20 |
| D606831 | Bolt or nut tightening device | Ken-ichi Shiota | 2009-12-29 |
| D605539 | Power increasing device with a display for wrench | Tatsuo Hirai | 2009-12-08 |
| 7275450 | Tightening torque measuring unit and torque indicating tightening device | Tatsuo Hirai | 2007-10-02 |
| D551998 | Torque measuring device | Tatsuo Hirai | 2007-10-02 |
| 6053080 | Device for tightening bolt and/or nut | Daijiro Yano, Shinji Fukuhara, Shozo Matsumura, Kenji Sato, Yoshiyuki Umemoto | 2000-04-25 |
| 5964128 | Bolt tightening device | Daijiro Yano, Shozo Matsumura, Kenji Sato | 1999-10-12 |
| 5953965 | Device for tightening bolt and nut | Shozo Matsumura, Kenji Sato | 1999-09-21 |