Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858200 | Method for determining the presence of hydrocarbons in subsurface geological formations by comparative assessment of compressional and shear wave reflection data | — | 1989-08-15 |
| 4858201 | Method for estimating shear wave reflection data from acquired compressional wave reflection data | Ray Steven Spratt | 1989-08-15 |
| 4858202 | Method for estimating shear wave reflection data from acquired compressional wave reflection data | Thomas J. Fitch, Ray Steven Spratt | 1989-08-15 |