Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909991 | Self adjusting plug | Donald M. Brown | 1999-06-08 |
| 5435662 | Method and device for marking paint strips and maintenance covers when resurfacing streets | Donald M. Brown | 1995-07-25 |