Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805589 | Fire-extinguishing device for oil burner | Yutaka Nakanishi, Toshihiko Yamada | 1989-02-21 |
| 4767318 | Catalyst moving structure for oil burner | Yutaka Nakanishi, Toshihiko Yamada | 1988-08-30 |