Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5069132 | Water-in-oil type emulsion explosive envelope | Shigeru Kakino, Toshinori Tamari, Masao Takahashi | 1991-12-03 |
| 4852076 | Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics | Takeo Ohta, Shizuhiko Tanigawa | 1989-07-25 |
| 4547875 | Optical recording and retrieving disc | Takeo Ohta, Nobuo Akahira | 1985-10-15 |
| 4330883 | System and method of optical information storage in a recording disc | Takeo Ohta, Nobuo Akahira, Tadaoki Yamashita | 1982-05-18 |
| 4322839 | Method and apparatus for recording and reproducing information on and from an optical disk | Tadaoki Yamashita, Takeo Ohta, Nobuo Akahira, Mutsuo Takenaga | 1982-03-30 |
| 4278734 | Optical information recording material and method of recording and reproducing information using same material | Takeo Ohta, Nobuo Akahira, Tadaoki Yamashita | 1981-07-14 |