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| 4:13-cv-02725 | WesternGeco LLC v. Petroleum Geo-Services, Inc. et al | Sep 16, 2013 |
| IPR2015-00565 | ION Geophysical Corporation v. WESTERNGECO, L.L.C. | Jan 14, 2015 |
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| IPR2014-01477 | Petroleum Geo-Services, Inc. v. WESTERNGECO, L.L.C. | Sep 11, 2014 |
| IPR2014-01478 | Petroleum Geo-Services, Inc. v. WESTERNGECO, L.L.C. | Sep 11, 2014 |
