Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5133825 | Plasma generating apparatus | Yoshimi Hakamata, Yukio Kurosawa, Tadashi Sato, Hiroaki Kojima, Yasunori Ohno +1 more | 1992-07-28 |
| 4865709 | Magnetron sputter apparatus and method for forming films by using the same apparatus | Yukio Nakagawa, Youichi Ohshita, Tadashi Sato, Eiji Setoyama, Mitsuhiro Kamei | 1989-09-12 |
| 4434335 | Compressed-gas circuit interrupter with a heater | Osamu Koyanagi | 1984-02-28 |
| 4182942 | Puffer-type gas-blast circuit breaker | Osamu Koyanagi, Yoshio Yoshioka | 1980-01-08 |