Patent Review Over ResMed Ltd.'s Sleep Mask Put to Bed (1)

Sleep apnea mask maker ResMed Ltd. is resting more easily after it scored a victory on one of its patents covering its sleep mask technology.

Fisher & Paykel Healthcare Ltd. challenged a key ResMed patent at the U.S. Patent and Trademark Office’s Patent Trial and Appeal Board but the board upheld the majority of the patent’s claims.

The decision is a significant one for ResMed because it helps protect its growing franchise in medical equipment used to diagnose and treat respiratory disorders that occur during sleep. The San Diego-based company—whose most recent full fiscal year revenues reached $2.3 billion—has reaped ...