Patent US 3397590A
| Patent number | US 3397590A (click link for details and documents via Google Patents) |
|---|---|
| Title | Helical gear drive mechanism with anti-backlash means |
| Inventors | Leon A Prentice |
| Company | Tektronix Inc |
| Filing date | 1967-03-02 |
| Grant date | 1968-08-20 |