Mosel-Vitelic of Taiwan this week filed a complaint at the U.S. International Trade Commission charging that Hitachi Ltd. and Elpdia Memory Inc. had infringed certain patents on DRAM and flash memory.
The Taiwan chip maker also named the U.S. subsidiaries of the Japanese firms -- Hitachi Semiconductor America and Elpida Memory (USA)- in the complaint.
The ITC must agree to accept the case before launching an investigation. The Commission hasn't yet acted on the Mosel-Vitelic complaint.
This is the latest in a rash of foreign electronic firms using their American subsidiaries to file patent violation complaints at the U.S. trade body against other overseas competitors. The firms seek an ITC ruling upholding patent infringement as a basis to bar imports into the U.S. of the offending products. Most cases are rejected or settled long before the adjudication reaches the import ban stage.