Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6289634 | Crossing guard | David L. Knight | 2001-09-18 |
| 6115963 | Crossing guard | David L. Knight | 2000-09-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6289634 | Crossing guard | David L. Knight | 2001-09-18 |
| 6115963 | Crossing guard | David L. Knight | 2000-09-12 |