Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698008 | Contact material for vacuum valve and method of manufacturing the same | Tsuneyo Seki, Tsutomu Okutomi, Takashi Kusano | 1997-12-16 |
| D387206 | toothbrush head | Kazumi Oishi | 1997-12-09 |
| 5687472 | Method of manufacturing a vacuum interrupter | Mitsutaka Honma, Hiromichi Somei, Tadahiro Aihara, Tsuneyo Seki | 1997-11-18 |
| D383608 | Toothbrush | Kazumi Oishi | 1997-09-16 |
| 5642470 | Singing voice synthesizing device for synthesizing natural chorus voices by modulating synthesized voice with fluctuation and emphasis | Tatsuro Matsumoto | 1997-06-24 |