Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5812709 | Optical device having switching function | Hideaki Arai, Kenji Akiba | 1998-09-22 |
| 5499308 | Guided-wave optical multi/demultiplexer | Hideaki Arai | 1996-03-12 |
| 4953934 | Waveguide type light merging and branching device | Katsuyuki Imoto, Hirohisa Sano, Masaru Miyazaki, Naoyuki Matsuoka | 1990-09-04 |
| 4753497 | Directional coupler for coupling single-polarization optical fibers | Yoshimasa Fujii, Yoshinobu Mitsuhashi | 1988-06-28 |