Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648530 | Light emitting keyed keyboard | Tohru Nakanishi, Akihiko Kitanaka | 2003-11-18 |
| 5757841 | Method and apparatus for joining new electrode to consumed electrode of electric furnace | Yasuaki Ikitsu, Hajime Amano, Tetsuo Okamoto | 1998-05-26 |
| 5638398 | Method and apparatus for joining new electrode to consumed electrode of electric furnace | Yasuaki Ikitsu, Hajime Amano, Tetsuo Okamoto | 1997-06-10 |