Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831459 | Guide apparatus with rotating elements for ensuring perpendicular scanning movements of a hand-operated image scanner | — | 1989-05-16 |
| 4818826 | Coordinate input apparatus including a detection circuit to determine proper stylus position | — | 1989-04-04 |
| 4818851 | High precision coordinate input device using sequentially driven conductors in an input plane and stored correction values | — | 1989-04-04 |