Patent US 4821030A
| Patent number | US 4821030A (click link for details and documents via Google Patents) |
|---|---|
| Title | Touchscreen feedback system |
| Inventors | Brian Batson, Brian D. Diehm |
| Company | Tektronix Inc |
| Filing date | 1986-12-19 |
| Grant date | 1989-04-11 |
| Patent number | US 4821030A (click link for details and documents via Google Patents) |
|---|---|
| Title | Touchscreen feedback system |
| Inventors | Brian Batson, Brian D. Diehm |
| Company | Tektronix Inc |
| Filing date | 1986-12-19 |
| Grant date | 1989-04-11 |