Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4790862 | Air cleaning machine | Syuzo Tokumitsu, Masao Fukunaga, Katsunory Zaizen | 1988-12-13 |
| 4586020 | Sheathed resistance heater | Hidekata Kawanishi | 1986-04-29 |
| 4506251 | Sheathed resistance heater | Hidekata Kawanishi | 1985-03-19 |