Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5777969 | Dual-layered optical disc and pickup head | Morio Tomiyama | 1998-07-07 |
| 5756265 | Multilayer optical disc and method of making same | Shinya Abe | 1998-05-26 |
| 5350499 | Method of producing microscopic structure | Narito Shibaike, Michiyoshi Nagashima, Fumiaki Ueno | 1994-09-27 |
| 5268886 | Method and apparatus for reproducing signals using an optical disk having V-shaped grooves | Michiyoshi Nagashima, Fumiaki Ueno | 1993-12-07 |
| 5268056 | Plasma surface treating method and apparatus | Michiyoshi Nagashima, Fumiaki Ueno, Taro Nambu, Hiroyuki Ogawa | 1993-12-07 |
| 5221416 | Plasma surface treating method | Michiyoshi Nagashima, Fumiaki Ueno, Taro Nambu, Hiroyuki Ogawa | 1993-06-22 |
| 5134604 | Combination optical data medium with multiple data surfaces and cassette therefor | Michiyoshi Nagashima, Fumiaki Ueno, Hiroyuki Ogawa, Taro Nambu | 1992-07-28 |