Issued Patents All Time
Showing 1–6 of 6 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 |
| 5233582 | Optical waveguide recording medium playing apparatus | Naohiro Tanno, Kiyofumi Chikuma | 1993-08-03 |
| 5216219 | Disk manufacturing apparatus | Shinichi Yokozeki | 1993-06-01 |
| 5214633 | Optical waveguide recording medium playing apparatus | Naohiro Tanno, Kiyofumi Chikuma | 1993-05-25 |
| 4221773 | Method of producing a carbon diaphragm for an acoustic instrument | Tsunehiro Tsukagoshi, Shinichi Yokozeki, Toshikazu Yoshino | 1980-09-09 |