Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874044 | Method for oil recovery using a modified heteropolysaccharide | Peter D. Robison | 1989-10-17 |
AS
Arthur J. Stipanovic
Overall (1989): #130,744 of 140,708Top 95%
1
Patents 1989