Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873488 | Induction logging sonde with metallic support having a coaxial insulating sleeve member | Richard N. Chandler, John F. Hunka | 1989-10-10 |
| 4837517 | Spatial frequency method and apparatus for investigating earth conductivity with high vertical resolution by induction techniques | — | 1989-06-06 |
| 4818946 | Method and apparatus for enhancing the resolution of an induction logging tool in measuring a characteristic of a borehole formation | — | 1989-04-04 |
| 4800496 | Method for determining induction sonde error | William B. Vandermeer, William D. Flanagan | 1989-01-24 |