| 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 |