Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4425665 | FSK Voiceband modem using digital filters | — | 1984-01-10 |
| 4412339 | Zero-crossing interpolator to reduce isochronous distortion in a digital FSK modem | Peter H. Alfke | 1983-10-25 |