Intel Corp has filed an antitrust lawsuit against the SoftBank Group Corp- alleging the firm stockpiled patents to hold technology companies with numerous lawsuits.

The complaint filed on Monday in the U.S. District Court for the Northern District of California alleged that Fortress Investment Group, which SoftBank bought in 2017 for $3.3 billion, acquired control of over 1,000 U.S. technology patents.

Intel said that Fortress and other companies own or control filed lawsuits against the Santa Clara chipmaker claiming that nearly every Intel processor made since 2011 infringed patents.

Intel brings this complaint to end anti-competitive patent aggregation by Fortress, and a web of that Fortress owns or controls. Intel said Fortress’ efforts to collect patents constituted anticompetitive behavior as they were driven by the idea that its purchases would cost lesser than what technology companies would pay to avoid lawsuits.

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