Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5850140 | Electric field sensor having sensor head with unbalanced electric field shield to shield branched optical waveguides against an applied electric field | Michikazu Kondo | 1998-12-15 |
| 5815610 | Optical modulation system | Ryoji Muramatsu, Takanobu Tanabe, Tsugio Takeda | 1998-09-29 |
| 5638468 | Optical modulation system | Ryoji Muramatsu, Takanobu Tanabe, Tsugio Takeda | 1997-06-10 |
| 5625284 | Electric field sensor having sensor head with unbalanced electric field shield to shield branched optical waveguides against an applied electric field | — | 1997-04-29 |
| 5583637 | Optical electric field sensor using optical component having electrooptical effect | Takanobu Tanabe | 1996-12-10 |
| 5488677 | Electric field sensor | — | 1996-01-30 |