Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7711238 | Optical fiber and optical fiber coupler, erbium-doped optical fiber amplifier, and optical waveguide using the same | Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Daiichiro Tanaka | 2010-05-04 |
| 7406236 | Optical fiber and optical fiber coupler, erbium-doped optical fiber amplifier, and optical waveguide using the same | Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Daiichiro Tanaka | 2008-07-29 |
| 7346258 | Optical fiber and optical fiber coupler, erbium-doped optical fiber amplifier, and optical waveguide using the same | Masashi Ikeda, Masakazu Nakayama, Kuniharu Himeno, Masaaki Ohtsuka, Daiichiro Tanaka | 2008-03-18 |