Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5067113 | Efficient generation of traveltime tables for two dimensional and three dimensional prestack depth migration | Douglas W. Hanson, Shein S. Wang | 1991-11-19 |
| 5062086 | Calculation of raypaths and wavepaths from traveltime tables for the tomographic estimation of transmission velocities | Shein S. Wang, Douglas W. Hanson | 1991-10-29 |