Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6067285 | Optical disc | Kenji Ohta, Masayasu Futagawa, Shinji Yamagami, Yoshiteru Murakami, Hiroyuki Ikenaga +3 more | 2000-05-23 |
| 5820795 | Manufacturing method of magneto-optical master disk | Hirotoshi Takemori, Tetsuya Inui, Kenji Ohta | 1998-10-13 |
| 5587994 | Cartridge used for a disc-shaped recording medium | Zenjiro Yamashita, Kazuhiko Arikawa, Kenji Ohta | 1996-12-24 |
| 5500850 | Optical disk with grooves and pits of different depths | Kazuo Van, Kenji Ohta, Tetsuya Inui, Hirotoshi Takemori, Hirotaka Toki | 1996-03-19 |
| 5490131 | Optical disk | Kenji Ohta, Masayasu Futagawa, Shinji Yamagami, Yoshiteru Murakami, Hiroyuki Ikenaga +3 more | 1996-02-06 |
| 5453975 | Optical disc with surface coating and manufacturing method therefor | Kenji Ohta, Tetsuya Inui | 1995-09-26 |
| 5399461 | Optical disk for use in optical memory devices | Kazuo Van, Kenji Ohta, Tetsuya Inui, Hirotoshi Takemori, Hirotaka Toki | 1995-03-21 |
| 5331625 | Optical disc with antistatic coating containing tin oxide and phosphorous | Michinobu Mieda, Hirotoshi Takemori, Kenji Ohta, Hiroo Yoshidome | 1994-07-19 |