Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4351867 | Thermal insulation composite of cellular cementitious material | Charles E. Crepeau | 1982-09-28 |
| 4310996 | Cement reinforced gypsum foam with mineral wool | Charles E. Crepeau | 1982-01-19 |