Taranto, Circuit Judge.
PGS Geophysical AS owns U.S. Patent No. 6,906,981, which describes and claims methods and systems for performing "marine seismic surveying" to determine the structure of earth formations below the seabed. WesternGeco, L.L.C., a competitor of PGS's, filed three petitions requesting inter partes reviews (IPRs) of claims 1-38...
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