Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7148791 | Wireless danger proximity warning system and method | Mark D. Roberts | 2006-12-12 |
| 6917284 | Railroad collision avoidance system and method for preventing train accidents | Mark D. Roberts | 2005-07-12 |
| 6759948 | Railroad collision avoidance system and method for preventing train accidents | Mark D. Roberts | 2004-07-06 |
| 5201553 | Pipe connector for washing machine drainage | — | 1993-04-13 |