https://www.theregister.co.uk/2018/06/04/apple_touchscreen_patent_dispute_zeroclick/

Apple has been pulled back into a patent-infringement lawsuit in the US over its touchscreen iPhones – after an appeals court overturned a previous ruling, and complained about its sloppy analysis.

The appeals court, covering northern California, took the unusual step of slapping down [PDF] one of its own – District Judge Jon Tigar – for deciding back in 2016 that the two patents owned by Zeroclick were not valid because they hadn't shown how they would work in a real situation.