Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6639913 | System and method for communicating voice and data over a local packet network | David P. Frankel, Kenneth M. Kolderup | 2003-10-28 |
| 6075784 | System and method for communicating voice and data over a local packet network | David P. Frankel, Kenneth M. Kolderup | 2000-06-13 |