Japan-based Sekisui launched an enforcement campaign against Kuraray entities in Germany and Korea, according to a complaint filed Wednesday in the US District Court for the Eastern District of Virginia. Kuraray America said it faces an immediate threat of a lawsuit because Sekisui holds US patents that are counterparts to those asserted in the foreign courts.
Kuraray America said six Sekisui patents covering interlayer film for laminated glass are invalid for various reasons, including obviousness.
Sekisui sent a letter ...
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