Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864125 | Extra magnetic field positioning apparatus | Hisashi Minami, Toshihisa Deguchi, Takao Hyuga | 1989-09-05 |
| 4849953 | Tracking circuit for an optical information recording and reproducing apparatus | Toshihisa Deguchi, Shigeo Terashima | 1989-07-18 |