Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340637 | Optical device diffraction gratings and a photomask for use in the same | Makoto Okai, Akio Ohishi, Motohisa Hirao, Hiroyoshi Matsumura, Tatsuo Harada +2 more | 1994-08-23 |
| 5308995 | Semiconductor strained SL APD apparatus | Hitoshi Nakamura | 1994-05-03 |
| 5283846 | Optical isolator, optical circuit, and rare-earth-doped fiber optical amplifier | Takashi Toyonaka, Makoto Haneda, Yuichi Ono | 1994-02-01 |