Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7209662 | Wavelength multiplex transmission device | — | 2007-04-24 |
| 6539153 | Light limiter | Takaaki Ogata, Hirotoshi Nagata, Junichiro Ichikawa, Kaoru Higuma | 2003-03-25 |
| 6335991 | Optical modulation apparatus and optical modulation method | — | 2002-01-01 |
| 6233385 | Light limiter | Takaaki Ogata, Hirotoshi Nagata, Junichiro Ichikawa, Kaoru Higuma | 2001-05-15 |
| 6218658 | Optical fuse | Takaaki Ogata, Hirotoshi Nagata, Junichiro Ichikawa, Kaoru Higuma | 2001-04-17 |
| 6215572 | Wavelength division multiplexing optical transmission apparatus | — | 2001-04-10 |
| 6134372 | Light intensity attenuator and attenuating method | Junichiro Ichikawa, Hirotoshi Nagata, Kaoru Higuma, Junichiro Minowa, Takaaki Ogata | 2000-10-17 |