Pfizer and BioNTech won a round in their legal battle with Moderna over COVID-19 vaccine patents on Wednesday, convincing a U.S. Patent Office tribunal that two patents Moderna accused them of infringing were invalid.

Patent Trial and Appeal Board (PTAB) docket entries indicate that the PTAB has invalidated all challenged claims of Moderna’s patents for its COVID-19 vaccine technology. The final written decisions remain sealed.

A German court on Wednesday ruled that Pfizer and its partner BioNTech violated a COVID-19 vaccine patent held by Moderna .

A German court ruled on Wednesday that BioNTech and Pfizer violated a Covid-19 patent held by rival Moderna. US-based Moderna had asserted claims for information and damages for infringement of its patent rights in the development of the Covid-19 vaccine.