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Respiratory medical devices maker ResMed files a new International Trade Commission complaint against rival BMC Medical and its U.S. distributor.

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San Diego respiratory devices maker ResMed (NYSE:RMD) filed a new complaint with the International Trade Commission, this time against Chinese medtech company BMC Medical Co. and its U.S. subsidiary 3B Products.

ResMed had previously filed a lawsuit against BMC and 3B, accusing the duo of infringing on patents for CPAP devices, a nasal mask and a nasal pillow interface. ResMed announced this week that it amended the lawsuit to include additional patents.

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