Kaspersky Labs used a portion of US case law to demand a patent troll fork over money before they would agree to drop the lawsuit Wetro Lan filed against them.  Wetro Lan picked up a patent with a somewhat famous pasts as being used in numerous dubious lawsuits filed by what are politely known as patent trolls.   The patent is a ridiculously vague description of a firewall and trolls have used it in the past to sue companies in the hopes of a payout to prevent the case from going to court.  Not only did Kaspersky go to court to fight; instead of waiting for the amount of money demanded to drop to zero they launched a counter-suit and refused to end the litigation until they received $10,000.  This meant that Wetro Lan had to continue to pay to continue the case and once they realized they were stuck they acquiesced to Kaspersky's demands, after talking them down to $5000.  Check out The Register for more information.

"The Russian antivirus vendor said that it collected a $5,000 payment to agree to drop a patent infringement case where it was the defendant, after the litigator agreed they had no hope of winning their claim."

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