Patent US 4809208A
| Patent number | US 4809208A (click link for details and documents via Google Patents) |
|---|---|
| Title | Programmable multistage digital filter |
| Inventors | Victor L. Hansen, Eric Etheridge |
| Company | Tektronix Inc |
| Filing date | 1987-04-03 |
| Grant date | 1989-02-28 |