Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6465070 | Optical recording medium | Hajime Utsunomiya | 2002-10-15 |
| 6461710 | Optical recording medium | Hajime Utsunomiya | 2002-10-08 |
| 6449240 | System, method and information medium for storing and reading information as a difference in a surface potential or a surface charge density | Hajime Utsunomiya, Takuya Tsukagoshi | 2002-09-10 |
| 6438085 | Optical recording method | Tatsuya Kato, Isamu Kuribayashi, Hajime Utsunomiya | 2002-08-20 |
| 6430128 | Method for reading optical information medium and optical information medium | Tatsuya Kato, Hajime Utsunomiya, Hiroshi Shingai | 2002-08-06 |
| 6406772 | Optical recording medium and method for making | Junji Tominaga, Isamu Kuribayashi, Makoto Takahashi | 2002-06-18 |