Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810970 | Oil-based flushed zone electromagnetic well logging system and method | Donald L. Johnson | 1989-03-07 |
WW
Wayne F. Warren
Overall (1989): #45,388 of 140,708Top 35%
1
Patents 1989