Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5950343 | Method for assembling poster frame with non-sliding spring mechanism | — | 1999-09-14 |
| 5930928 | Front-loading poster frame device | Thomas L. Kantola, Ronald E. Grewe | 1999-08-03 |
| 5926986 | Non-sliding spring mechanism for poster frames | — | 1999-07-27 |