Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5142569 | Apparatus for selectively enabling subscriber device to respond to ringing signal in dependence upon ringing cadence | George W. Peters, Jonathan D. Luckey, Robert H. Kraemer | 1992-08-25 |
| 4718082 | Modem for effecting full duplex asynchronous/synchronous digital data communications over voice grade telephone link | Timothy H. Scheffler, Paul W. Schirmer | 1988-01-05 |