Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5345729 | Support for tamper proof securing light fixture on suspended ceiling panel | Douglas Prahst, Ralph H. Laird, Richard Kuchler, William D. Benning | 1994-09-13 |
| 5263295 | Suspended security ceiling system | Ralph H. Laird, Richard Kuchler, William D. Benning | 1993-11-23 |