Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5356446 | Low density insulating and fire-resistant perlite concrete | David A. Smetana, Alfonzo L. Wilson, Richard J. Lenczewski | 1994-10-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5356446 | Low density insulating and fire-resistant perlite concrete | David A. Smetana, Alfonzo L. Wilson, Richard J. Lenczewski | 1994-10-18 |