Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888795 | Videotelephone apparatus for transmitting high and low resolution video signals over telephone exchange lines | Fumio Ando, Takayuki Yokoyama | 1989-12-19 |
| 4810838 | Frequency coupling position coordinates determination apparatus | Yoichi Sato, Tadashi Otsuka | 1989-03-07 |
| 4803737 | Optical digitizer | Yoichi Sato | 1989-02-07 |