Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221386 | Cement board having reinforced edges | Robert P. Ensminger, Robert E. McCleary | 1993-06-22 |
| 4916004 | Cement board having reinforced edges | Robert P. Ensminger, Robert E. McCleary | 1990-04-10 |