Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6192646 | Round cladding system | Ronald E. Grewe, Matthew Adams | 2001-02-27 |
| 6009683 | Round column cladding system | Ronald E. Grewe, Matthew Adams | 2000-01-04 |
| 5947589 | Illuminated lightbox structure with light dispersion members | David U. Hillstrom | 1999-09-07 |
| 5931564 | Illuminated canopy system | David U. Hillstrom | 1999-08-03 |
| 5881528 | Round column cladding system | Ronald E. Grewe | 1999-03-16 |
| RE36039 | Illuminated canopy system | David U. Hillstrom | 1999-01-12 |
| 5746503 | Illuminated canopy system | David U. Hillstrom | 1998-05-05 |
| 5713659 | Illuminated canopy with access doors | David U. Hillstrom | 1998-02-03 |
| 5613763 | Method for installing illuminated canopy system | David U. Hillstrom | 1997-03-25 |
| 5537302 | Illuminated sign with patterned openings on light dispersion member | David U. Hillstrom | 1996-07-16 |
| 5444931 | Swing arm mechanism for wall sign | — | 1995-08-29 |
| 5381324 | Illuminated canopy system | David U. Hillstrom | 1995-01-10 |
| 4958458 | Poster display device with longitudinal retention of frame sections by inserts | David U. Hillstrom, Randall Palmer | 1990-09-25 |