Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5371989 | Use of fibrous mat-faced gypsum board in exterior finishing systems for buildings and shaft wall assemblies | Charles W. Lehnert | 1994-12-13 |
| 5342680 | Glass mat with reinforcing binder | — | 1994-08-30 |
| 5319900 | Finishing and roof deck systems containing fibrous mat-faced gypsum boards | Charles W. Lehnert | 1994-06-14 |