Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683838 | Method of producing information recording medium | Masayuki Iijima, Hironori Kamiyama, Masato Okabe, Hiroyuki Obata, Minoru Utsumi | 1997-11-04 |
| 5660958 | Information recording medium, and information recording and reproducing method | Masayuki Iijima, Hironori Kamiyama, Masato Okabe, Hiroyuki Obata, Minoru Utsumi | 1997-08-26 |