Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114617 | High strength structural perlite concrete | David A. Smetana | 1992-05-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114617 | High strength structural perlite concrete | David A. Smetana | 1992-05-19 |