Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817805 | Traffic channelizer devices | Charles M. Mettler | 2004-11-16 |
| 6769207 | Portable sign assembly | Charles M. Mettler, David E. Cowan | 2004-08-03 |
| 6733205 | Guardrail delineators | Charles D. Bailey | 2004-05-11 |
| D486089 | Traffic channelizer | Charles M. Mettler | 2004-02-03 |
| D486250 | Base support for post or other upright | Charles M. Mettler | 2004-02-03 |