Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357150 | High-efficiency electrostatic air filter device | Naoki Sugita | 1982-11-02 |
| 4321066 | Electric dust collecting apparatus | — | 1982-03-23 |
| 4313741 | Electric dust collector | Naoki Sugita | 1982-02-02 |