Several industry groups, law professors and a former chairman of the Federal Trade Commission filed amicus briefs last week supporting the FTC in its antitrust suit against Qualcomm alleging that the company illegally established a monopoly on the modem chip market.

A district court in May ruled that Qualcomm’s “no license, no chips” business practice violates federal antitrust laws, handing a win to the FTC. U.S. District Judge Lucy Koh issued a permanent injunction in the case, barring Qualcomm from requiring customers to license its patents in order to buy modem chips from the company, among other things.

…

“While we don’t always agree about how antitrust law should develop, we all think the FTC and the district court were right to hold that Qualcomm’s ‘no license, no chips’ policy is anti-competitive under traditional antitrust principles,” Mark Lemley, a professor at Stanford Law School and one of the brief’s authors, told Law360 on Monday.