Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9389248 | Sagnac interferometer-type fiber-optic current sensor | Masao Takahashi, Yukihisa Hirata | 2016-07-12 |
| 8836950 | SAGNAC interferometer-type fiber-optic current sensor | Masao Takahashi, Yukihisa Hirata | 2014-09-16 |
| 8319958 | Phase modulator, phase modulator assembly, and photosensor | Masao Takahashi, Masahiro Hamaguchi, Takashi Miyabe, Tsuyoshi Kuwabara, Tokihiro Umemura | 2012-11-27 |
| 6831749 | Sagnac interferometer current sensor | Aritaka Ohno, Ryuji Usui, Kiyohisa Terai, Masao Takahashi | 2004-12-14 |