Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872507 | Well bore apparatus arranged for operating in high-temperature wells as well as in low-temperature wells | Robert L. Ronco, Sr. | 1989-10-10 |
PW
Piero Wolk
Overall (1989): #68,348 of 140,708Top 50%
1
Patents 1989