Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4684213 | Submarine optical fiber cable with dam means | Koushi Ishihara, Nobuyuki Yoshizawa, Kiyoshi Funaki | 1987-08-04 |
| 4425146 | Method of making glass waveguide for optical circuit | Tatsuo Izawa, Hidefumi Mori, Nobuo Shimizu | 1984-01-10 |