Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34775 | Lightweight aggregate from flyash and sewage sludge | Timothy M. Nechvatal | 1994-11-01 |
| 5342442 | Lightweight aggregate from flyash and sewage sludge | Timothy M. Nechvatal | 1994-08-30 |