Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803677 | Rotary recording medium having a guide track and recording and reproducing apparatus therefor | Hirohisa Yamaguchi, Tadao Nagai, Akira Mashimo | 1989-02-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803677 | Rotary recording medium having a guide track and recording and reproducing apparatus therefor | Hirohisa Yamaguchi, Tadao Nagai, Akira Mashimo | 1989-02-07 |