Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6596389 | Foamed composite panel with improved acoustics and durability | Chester W. Hallett, John Felegi, Jr., William F. Fry, Robert Drennan Lewis, Alfred H. Adey | 2003-07-22 |
| 5417025 | Resiliently mounted accessible tile | James P. Rineer, Melvin H. Shaub | 1995-05-23 |
| 5349803 | Lanced fire-rated runner | — | 1994-09-27 |
| 5347783 | Prenotched fire-rated runner | Sandor A. Frecska, Gale E. Sauer | 1994-09-20 |
| 4885889 | Grid accent and ceiling boards | John M. Hemphill | 1989-12-12 |
| 4580386 | Expansion clip on a ceiling runner | John M. Hemphill, Daniel C. Ziegler | 1986-04-08 |