Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7519168 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 2009-04-14 |
| 6693997 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 2004-02-17 |
| 6636519 | Network access method and network access server therefor | Dale M. Walsh, Andrew L. Norrell, Donald C. Balton, Terrel L. Jones, Marc Baum +5 more | 2003-10-21 |
| 6097794 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 2000-08-01 |
| 5912888 | Digital network access server | Dale M. Walsh, Andrew L. Norrell, Donald C. Balton, Terrel L. Jones, Marc Baum +5 more | 1999-06-15 |
| 5872836 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 1999-02-16 |
| 5841842 | Telephone call routing and switching techniques for data communications | Marc Baum, Donald C. Balton, Daniel L. Schoo | 1998-11-24 |
| 5832277 | System for arbitrating demand on memory during configuration of a computer add-on card | Ronald Joseph Sullivan, Brett Walter Chaveriat, Khodor S. Elnashar | 1998-11-03 |
| 5761281 | Telephone call routing and switching techniques for data communications | Marc Baum, Donald C. Balton, Daniel L. Schoo, Peter P. Jankus, Lih-Shyng Tzeng +1 more | 1998-06-02 |
| 5724413 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 1998-03-03 |
| 5646983 | Host computer digital signal processing system for communicating over voice-grade telephone channels | Andrew L. Norrell | 1997-07-08 |
| 5577105 | Telephone call routing and switching techniques for data communications | Marc Baum, Donald C. Balton, Daniel L. Schoo, Peter P. Jankus, Lih-Shyng Tzeng +1 more | 1996-11-19 |
| 5528595 | Modem input/output signal processing techniques | Dale M. Walsh, Andrew L. Norrell, Donald C. Balton, Terrel L. Jones, Marc Baum +3 more | 1996-06-18 |
| 5008901 | Asymmetrical duplex error-controlled modem | Clifford H. Wallach, Dale M. Walsh | 1991-04-16 |