Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857831 | Borehole casing diagnostic apparatus and method | Jiro Takeda | 1989-08-15 |
DD
Dylan H. Davies
Overall (1989): #118,561 of 140,708Top 85%
1
Patents 1989