An Xbox import ban would harm many companies and consumers, the Entertainment Software Association wrote in Friday comments to the USITC.

"The video game industry is a significant contributor to the U.S. economy and job growth, and reaches American consumers of all walks of life," the trade group's lawyers wrote. "An exclusion order banning the importation of Xbox gaming consoles into the U.S. would harm not only Microsoft, but a variety of other parties across the gaming ecosystem, including most importantly consumers and game publishers."

Motorola Mobility does not sell video game consoles, and would "suffer no commensurate harm" if the USITC refuses to ban Xbox imports, the group said.

A Motorola spokeswoman wasn't immediately available for comment, but Motorola lawyers have argued that the judge's decision was justified. USITC rules do not make an except for import bans when the complaining company does not offer a competing product, Motorola's lawyers wrote.

The competition argument from Microsoft and its allies "ignores that personal electronics technologies are converging and that the accused Xbox products are more than just video game systems -- the Xbox 360 is marketed by Microsoft as an entertainment system that represents, among other things, 'the future of TV,' in direct competition with Motorola's domestic industry set-top box products," Motorola's lawyers wrote in late May.