Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874044 | Method for oil recovery using a modified heteropolysaccharide | Arthur J. Stipanovic | 1989-10-17 |
PR
Peter D. Robison
Overall (1989): #69,351 of 140,708Top 50%
1
Patents 1989