Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6778665 | Distribution of current draw in a line powered DAA | Jonathan H. Fischer, Donald R. Laturell, Lane A. Smith, Michael G. Williams | 2004-08-17 |
| 6735305 | Detection of low tip/ring currents in a line powered DAA | Jonathan H. Fischer, Donald R. Laturell, Lane A. Smith, Michael G. Williams, Keith Eugene Hollenbach +1 more | 2004-05-11 |
| 6687371 | Maintaining an off-hook condition during a call bridge | Jonathan H. Fischer, Donald R. Laturell, Lane A. Smith, Michael G. Williams | 2004-02-03 |
| 6674857 | Startup procedure for international line powered DAA | Jonathan H. Fischer, Donald R. Laturell, Lane A. Smith, Keith Eugene Hollenbach, Weilin Zhu | 2004-01-06 |