Japanese company Resonac Hard Disk Corp. and its US unit sued for a declaratory judgment that their products don’t infringe a trio of MR Technologies GmbH patents.
The Austrian MR Tech has accused a Resonac customer of infringing US Patent Nos. 9,928,864, 11,138,997, and 12,020,734, Resonac said in a complaint filed Thursday in the US District Court for the Northern District of California. A pending MR Tech suit against Toshiba America Electronic Components Inc. centers on components supplied by Resonac, it said.
MR Tech and Western Digital Technologies Inc. jointly dismissed a lawsuit in May, months after ...