Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5652674 | Method for manufacturing domain-inverted region, optical wavelength conversion device utilizing such domain-inverted region and method for fabricating such device | Kazuhisa Yamamoto | 1997-07-29 |
| 5619369 | Diffracting device having distributed bragg reflector and wavelength changing device having optical waveguide with periodically inverted-polarization layers | Kazuhisa Yamamoto | 1997-04-08 |