Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487164 | Optical recording medium capable of assuring sufficient levels of signals required for reading/writing data, and stamper for manufacture of the same | Manabu Iwai, Katsuhiko Ohtomo, Tomiji Tanaka, Hiroshi Nakayama, Masayoshi Kanno +1 more | 2002-11-26 |
| 6349085 | High density recording medium with pit width to track pitch ratio in the range of 0.4 to 0.55 for push-pull tracking servo control | Katsuhiko Ohtomo, Mitsuo Arima | 2002-02-19 |