Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341824 | Method of upgrading rock and treated rock obtained therefrom | — | 1982-07-27 |
DL
Donald G. LeGrand
Overall (1982): #68,695 of 81,411Top 85%
1
Patents 1982