Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5796708 | Optical recording medium and recording system | Hideki Ohkawa, Tomohisa Yoshimaru, Nobuhisa Yoshida, Satoru Koyahara | 1998-08-18 |
| 5652037 | Information recording medium | Hideki Ohkawa, Nobuhisa Yoshida | 1997-07-29 |
| 5580632 | Information recording medium | Hideki Ohkawa, Nobuhisa Yoshida | 1996-12-03 |
| 5102708 | Data recording medium and method of manufacturing the same | Hideki Ohkawa | 1992-04-07 |
| 5013635 | Information storage medium | Hideki Ohkawa, Norio Ozawa, Hiroyuki Higashino | 1991-05-07 |
| 4985349 | Information storage medium | Kideki Ohkawa, Norio Ozawa | 1991-01-15 |