Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7257220 | Method and system for providing extended reach of a digital subscriber line signal | Robert A. Marshall | 2007-08-14 |
| 6963641 | Method and apparatus for providing variable attenuation to data signals in an XDSL frequency range | Robert A. Marshall | 2005-11-08 |