Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4337785 | Method using copper-copper-alloy tube for water supply | Kiyoji Sagisaka | 1982-07-06 |
| 4337793 | Copper-alloy tube water supply | Kiyoji Sagisaka | 1982-07-06 |
| 4330179 | Variable magnification projection device | — | 1982-05-18 |