Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308936 | Ultrasonic pen-type data input device | Takeo Z. O'Ishi, Mark S. Knighton | 1994-05-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308936 | Ultrasonic pen-type data input device | Takeo Z. O'Ishi, Mark S. Knighton | 1994-05-03 |