Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7373066 | Optical waveguide device and multiple optical waveguide device | Hiroshi Ishikawa, Makoto Horie, Hitoshi Suzuki | 2008-05-13 |
| 7272279 | Waveguide type optical branching device | Hiroshi Ishikawa | 2007-09-18 |