Patent US 4647889A
| Patent number | US 4647889A (click link for details and documents via Google Patents) |
|---|---|
| Title | Rotary control having variable detents |
| Inventors | John Addis |
| Company | Tektronix Inc |
| Filing date | 1985-11-15 |
| Grant date | 1987-03-03 |
| Patent number | US 4647889A (click link for details and documents via Google Patents) |
|---|---|
| Title | Rotary control having variable detents |
| Inventors | John Addis |
| Company | Tektronix Inc |
| Filing date | 1985-11-15 |
| Grant date | 1987-03-03 |