Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836032 | Method of determining the quality of steam for stimulating hydrocarbon production | Clifford L. Redus, Sze-Foo Chien | 1989-06-06 |
PS
Peter L. Sigwardt
Overall (1989): #69,268 of 140,708Top 50%
1
Patents 1989