Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860581 | Down hole tool for determination of formation properties | Julian Pop, Joseph L. Perkins | 1989-08-29 |
TZ
Thomas H. Zimmerman
Overall (1989): #49,727 of 140,708Top 40%
1
Patents 1989