Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6229949 | Polymer optical waveguide, optical integrated circuit, optical module and optical communication apparatus | Hideaki Takano, Mari Koizumi | 2001-05-08 |
| 6111998 | Semiconductor optical device, fiber optical amplifier and optical transmission system | Hirohisa Sano, Hiroyuki Gomyo | 2000-08-29 |
| 5763897 | Non-uniform thickness or bandgap superlattice betweeen cladding layer and multi-quantum well structure of pin optical waveguide | Hirohisa Sano | 1998-06-09 |
| 5742423 | Semiconductor optical modulator | Hirohisa Sano | 1998-04-21 |
| 5724462 | Integrated optical semiconductor device and optical gyroscope usinng the same | Shigehisa Tanaka, Ryoji Suzuki, Toshiya Yuhara | 1998-03-03 |
| 5666455 | Waveguide device | Masahiro Aoki, Takayuki Tsutsui, Kazuhisa Uomi, Tomonobu Tsuchiya, Makoto Okai +1 more | 1997-09-09 |
| 5574289 | Semiconductor optical integrated device and light receiver using said device | Masahiro Aoki, Hirohisa Sano, Shinji Sakano, Makoto Suzuki, Makoto Takahashi +2 more | 1996-11-12 |
| 5572616 | Waveguide device | Masahiro Aoki, Takayuki Tsutsui, Kazuhisa Uomi, Tomonobu Tsuchiya, Makoto Okai +1 more | 1996-11-05 |
| 5570439 | Optical waveguide device and optical transmission system | Hirohisa Sano | 1996-10-29 |