Apple has told US District Judge Lucy Koh that the US Patent and Trademark Office is issuing a reexamination certificate, confirming four primary claims in the company's so-called "rubber-banding" patent, according to FOSS Patents. The patent describes the way iOS reacts whenever a user hits the bottom of a scrollable element. The USPTO once tentatively rejected claims in the patent, but Apple urged a court overseeing one of the company's lawsuits against Samsung to wait. Claim 19 in the patent helped Apple successfully sue Samsung for patent infringement last year.