Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6867708 | Communications system and method for interconnected networks having a linear topology, especially railways | Albert D. Darby, Jr., David Poltz, Mark Hefner, Irfan Ali, William Cherrick Schoonmaker | 2005-03-15 |
| 6400281 | Communications system and method for interconnected networks having a linear topology, especially railways | Albert D. Darby, Jr., David Michael Peltz, Mark Hefner, Irfan Ali, William Cherrick Schoonmaker | 2002-06-04 |