Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5111630 | Access floor panel with peripheral trim | Gordon J. Cooper, Todd N. Rose | 1992-05-12 |
| 4850176 | Access floor panel with peripheral trim | Todd N. Rose, Gordon J. Cooper | 1989-07-25 |
| 4729859 | Method for casting concrete panels | Leroy D. DeJong, Charles P. Keip | 1988-03-08 |
| 4639204 | Apparatus for centrifugally casting concrete panels | Leroy D. DeJong, Charles P. Keip | 1987-01-27 |
| 4606156 | Access flooring panel | Kenneth M. Sweers, G. Jack Cooper | 1986-08-19 |