Dec 12 (Reuters) - New Zealand's Fisher & Paykel Healthcare FPH.NZ filed a lawsuit in Australia on Tuesday against Resmed Inc RMD.N alleging the medical device manufacturer's respiratory treatment products violate four Fisher & Paykel patents.
Fisher & Paykel and California-based Resmed are engaged in patent disputes in several countries over medical devices used to treat respiratory conditions.
The company added its earnings forecast for fiscal 2018 remained unchanged.