Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12337313 | Storage container | Go KOBAYASHI, Junichi Hasegawa | 2025-06-24 |
| 12282188 | Ring-resonator filter device | Junichi Hasegawa | 2025-04-22 |
| 11835759 | Optical waveguide circuit | Junichi Hasegawa | 2023-12-05 |
| 10386576 | Optical waveguide circuit having identical polarization-cancelling S-shaped curves | Kazutaka Nara, Takashi Inoue, Hiroshi Kawashima | 2019-08-20 |
| 9488783 | Switch apparatus | Junichi Hasegawa, Kazutaka Nara | 2016-11-08 |
| 8718423 | Optical branching element and optical branching circuit | Kazutaka Nara | 2014-05-06 |
| 8380023 | Waveguide-type optical circuit | Kazutaka Nara | 2013-02-19 |
| 7492983 | Optical circuit device | Hiroshi Kawashima, Kazutaka Nara | 2009-02-17 |
| 7146079 | Dynamic gain equalizer | Kazutaka Nara, Kazuhisa Kashihara | 2006-12-05 |