TOULOUSE, France — Viasat Inc. said it is pursuing its challenge to Inmarsat’s European Aviation Network — which it alleges is a ground network with a satellite add-on, and not a mobile satellite system — in Belgium, Germany, Italy, France and possibly Spain and expects decisions in the first two jurisdictions in the first half of 2019.

Colin Ward, Viasat’s head of litigation, said the company was disappointed in a Dec. 7 decision by a British tribunal whose decision seemed to concede many Viasat points before concluding that they were irrelevant to the . . .

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