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| Number | Title | Issue Date |
| 4933912 | Three dimensional seismic prospecting method A 3-D seismic prospecting method is provided which employs an areal array of sources and receivers by which seismic traces are generated. The areal array is segregated into a plurality of shells and angularly separted sections from which a preselected num... | 06/12/1990 |
| 4635238 | Data processing method for correcting P and S wave seismic traces A method of processing seismic data enables correlation of P and S-wave seismic traces. First, P and S-waves are transmitted into the subsurface. The two-way vertical travel times are then measured for each wave to different depths so as to yield two sets... | 01/06/1987 |
