Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771414 | Optical fiber amplifier and optical communication system using the same | Atsushi Mori, Makoto Shimizu | 2004-08-03 |
| 6721092 | Thulium-doped fiber amplifier using pump light for improving conversion efficiency in a S-band | Shinichi Aozasa, Tadashi Sakamoto, Makoto Shimizu, Yoshiki Nishida | 2004-04-13 |
| 6678087 | Optical amplifier and optical fiber communication system using the amplifier | Noboru Takachio | 2004-01-13 |