Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879014 | Removal of organic acids from freshly produced bitumen | Hermanus G. Van Laar, Beverley Payne | 1989-11-07 |
RL
Richard H. Lea
Overall (1989): #65,714 of 140,708Top 50%
1
Patents 1989