Asahi Kasei Zoll Unit Sues Philips’ Respironics Over Patent

Asahi Kasei Corp.’s Zoll unit sued Royal Philips Electronics’ Respironics Inc. alleging infringement of a U.S. patent with equipment used to monitor patients being treated for sleep-disordered breathing.

Zoll, based in Chelmsford, Massachusetts, contends Respironics is wrongly using protected technology for data collection, covered by a 2004 patent, in its Philips EncoreAnywhere respirator, according to a complaint filed yesterday in federal court in Wilmington, Delaware.