Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6800174 | System for making wallboard or backerboard sheets including aerated concrete | Frederick Browne Gregg | 2004-10-05 |
| 6787486 | Backerboard sheet including aerated concrete core | Frederick Browne Gregg | 2004-09-07 |
| 6682617 | Method for making wallboard or backerboard sheets including aerated concrete | Frederick Browne Gregg | 2004-01-27 |