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In 2009 Judge Leonard Davis, of the U.S. District Court for the Eastern District of Texas, ordered a permanent injunction that "prohibits Microsoft from selling or importing to the United States any Microsoft Word products that have the capability of opening .XML, .DOCX or DOCM files (XML files) containing custom XML," according to an announcement by the plaintiff, Toronto-based i4i Inc.
On December 3, 2008, U.S. District Judge Stephen G. Larson granted a permanent injunction requested by Mattel against MGA.
On January 18, 2013, Judge Boasberg issued a permanent injunction prohibiting the Internal Revenue Service from enforcing regulations on Registered Tax Return Preparers, which otherwise required tax return preparers to register with the IRS and pass a written test as evidence of competency.