Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5345282 | Foldable optical apparatus | Seimei Ushiro | 1994-09-06 |
| 4921343 | Overhead projector | Seimei Ushiro | 1990-05-01 |
| 4776688 | Overhead projector | Seimei Ushiro | 1988-10-11 |
| 4588271 | Overhead projector | — | 1986-05-13 |