Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5066349 | Process for pultruding a composite sign | Jack E. Perko, Gary J. Wirth | 1991-11-19 |
| 4935279 | Pultruded composite sign and process therefor | Jack E. Perko, Gary J. Wirth | 1990-06-19 |