Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5241798 | Decorative suspended ceiling | Thomas E. Rose | 1993-09-07 |
| 5046294 | Perimeter clip | — | 1991-09-10 |
| RE33501 | Fire-rated beam with expansion relief section | Daniel C. Ziegler, Eugene E. Brady | 1990-12-25 |
| 4955134 | Method of forming a spring-like fire strip | — | 1990-09-11 |
| 4926607 | Compression leg | Thomas E. Rose | 1990-05-22 |
| 4916877 | Fire strip construction | — | 1990-04-17 |
| 4912894 | Interlocking cross tee | — | 1990-04-03 |
| 4890428 | Partition clip | — | 1990-01-02 |
| 4864791 | Fire strip | — | 1989-09-12 |
| 4827681 | Interlocking cross tee | — | 1989-05-09 |
| 4794745 | Tier drop grid system | Paul C. Gillenwater | 1989-01-03 |
| 4785603 | Interlocking cross tee | — | 1988-11-22 |
| 4727703 | Suspended ceiling grid structure | — | 1988-03-01 |
| 4713919 | Laser welded ceiling grid members | — | 1987-12-22 |
| 4606166 | Fire-rated beam with expansion relief section | Daniel C. Ziegler, Eugene E. Brady | 1986-08-19 |