Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6759795 | Spark plug | Kenichi Kumagai, Hiroaki Kuki | 2004-07-06 |
| 6755920 | Low-alloy heat-resistant steel, heat treatment method therefor, and turbine rotor comprising the same | Masatomo Kamada, Akitsugu Fujita, Yoshiyuki Ooba, Yoshihiro Okamura | 2004-06-29 |
| 6710752 | Helical antenna | Tetsuya Saito | 2004-03-23 |
| 6680561 | Spark plug | Tsutomu Shibata | 2004-01-20 |