Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5712915 | Encrypted digital circuit multiplication system | — | 1998-01-27 |
| 5515178 | Line state transmission system over digital channels for group 3 facsimile | Spiros Dimolitsas, Jack H. Rieser | 1996-05-07 |
| 5488653 | Facsimile interface unit (FIU) enhanced capabilities negotiation | Spiros Dimolitsas, Jack H. Rieser | 1996-01-30 |
| 5226044 | Low-rate encoding/digital speech interpolation system | Vaikunth N. Gupta, Jack H. Rieser, Henri G. Suyderhoud, Krishnamoorthy Virupaksha | 1993-07-06 |
| 4751736 | Variable bit rate speech codec with backward-type prediction and quantization | Vaikunth N. Gupta, Henri G. Suyderhoud, K. Virupaksha | 1988-06-14 |
| 4215252 | Video teleconference audio echo control unit | — | 1980-07-29 |