Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4891305 | Optical information recording element | Tsutomu Sato, Masaakira Umehara, Yutaka Ueda, Tetsu Yamamuro, Michiharu Abe | 1990-01-02 |
| 4767693 | Optical information recording medium | Yutaka Ueda, Tsutomu Sato, Masaakira Umehara, Michiharu Abe, Hitoshi Funakoshi +1 more | 1988-08-30 |
| 4758499 | Optical information recording medium | Michiharu Abe, Tsutomu Sato, Masaakira Umehara, Yutaka Ueda, Tetsu Yamamuro | 1988-07-19 |
| 4752554 | Optical information recording medium | Tsutomu Sato | 1988-06-21 |
| 4714667 | Optical information recording medium | Tsutomu Sato, Masaakira Umehara, Michiharu Abe, Yutaka Ueda | 1987-12-22 |
| 4696892 | Optical information recording medium | Michiharu Abe, Masaakira Umehara, Tsutomu Sato, Yutaka Ueda, Makoto Kunikane | 1987-09-29 |
| 4656121 | Optical information recording medium | Tsutomu Sato, Masaakira Umehara, Michiharu Abe, Yutaka Ueda | 1987-04-07 |
| 4652514 | Optical information recording medium | Michiharu Abe | 1987-03-24 |
| 4600625 | Optical information recording medium | Michiharu Abe | 1986-07-15 |
| 4477555 | Optical information recording medium | Makoto Kunikane, Masaakira Umehara, Kiyoshi Tanikawa, Michiharu Abe | 1984-10-16 |
| 4465767 | Optical information recording medium | Masaakira Umehara | 1984-08-14 |