Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5390456 | Decorative suspended ceiling | William J. Platt | 1995-02-21 |
| 5279033 | Method of making a beam for a decorative suspended ceiling | William J. Platt | 1994-01-18 |
| 5241798 | Decorative suspended ceiling | William J. Platt | 1993-09-07 |
| 4926607 | Compression leg | William J. Platt | 1990-05-22 |