Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5354352 | Contact material for vacuum circuit breakers | Tsuneyo Seki, Tsutomu Okutomi, Atsushi Yamamoto, Mikio Okawa | 1994-10-11 |
| 5246512 | Contact for a vacuum interrupter | Tsuneyo Seki, Tsutomu Okutomi, Atsushi Yamamoto, Tadaaki Sekiguchi | 1993-09-21 |
| 5149362 | Contact forming material for a vacuum interrupter | Tsutomu Okutomi, Atsushi Yamamoto, Seishi Chiba, Tsuneyo Seki, Mikio Okawa +3 more | 1992-09-22 |