Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6854203 | Combination advertising and warning sign | Bruce R. Kern, Lewis G. Libby | 2005-02-15 |
| 6014828 | Combination advertising and warning sign for shelving | Bruce R. Kern, Lewis G. Libby | 2000-01-18 |