Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969783 | Method of working fresnel step | Yasuo Ozawa, Koichi Sakakibara, Akira Nagakura, Seiji Igarashi | 1990-11-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4969783 | Method of working fresnel step | Yasuo Ozawa, Koichi Sakakibara, Akira Nagakura, Seiji Igarashi | 1990-11-13 |