Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5285274 | Optical waveguide recording medium and apparatus for playing the same | Naohiro Tanno, Kiyofumi Chikuma | 1994-02-08 |
| 5283777 | Three-dimensional optical recording medium and optical information recording apparatus using the same | Naohiro Tanno, Kiyofumi Chikuma | 1994-02-01 |