Patent US 4000461A
| Patent number | US 4000461A (click link for details and documents via Google Patents) |
|---|---|
| Title | R-wave detector |
| Inventors | Ronald Charles Barber, Don Loren Clark, Richard James Ballard |
| Company | Tektronix Inc |
| Filing date | 1973-10-04 |
| Grant date | 1976-12-28 |