Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857831 | Borehole casing diagnostic apparatus and method | Dylan H. Davies | 1989-08-15 |
JT
Jiro Takeda
Overall (1989): #96,895 of 140,708Top 70%
1
Patents 1989