Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698008 | Contact material for vacuum valve and method of manufacturing the same | Tsutomu Okutomi, Atsushi Yamamoto, Takashi Kusano | 1997-12-16 |
| 5687472 | Method of manufacturing a vacuum interrupter | Mitsutaka Honma, Hiromichi Somei, Tadahiro Aihara, Atsushi Yamamoto | 1997-11-18 |