Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866226 | Multi-phase circuit breaker employing arc extinguishing apparatus | Fumiyuki Hisatsune, Hiroshi Fujii, Shinji Yamagata | 1989-09-12 |
| 4828951 | Method for the formation of multicolor images | Tadashi Kaneko, Mitsutaka Arai | 1989-05-09 |