Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872000 | Coordinate input apparatus | Yoshiharu Konishi, Toshihiko Matsuda | 1989-10-03 |
| 4808802 | Method and system for protecting information recorded in information medium | — | 1989-02-28 |