Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221396 | Method of mass manufacture of rigid display sign | — | 1993-06-22 |
| 5096758 | Rigid display sign | — | 1992-03-17 |
| 4976055 | Wall mounted frame for posters and other printed material | — | 1990-12-11 |
| 4735006 | Changeable sign | — | 1988-04-05 |
| 4654101 | Method of making a changeable display sign | — | 1987-03-31 |
| 4637153 | Multiple configuration display sign system | Lawrence R. Hogan | 1987-01-20 |
| 4583309 | Tamper-proof display assembly | Lawrence R. Hogan | 1986-04-22 |
| 4530177 | Sign with interchangeable characters | — | 1985-07-23 |