Federal Court of Justice, Germany [2013]: Case No. BGH X ZR 141/10 – PNGase is available at https://juris.bundesgerichtshof.de/cgi-bin/rechtsprechung/document.py?Gericht=bgh&Art=en&sid=d1aa49dae984776e356fc52e45c7304f&nr=66704&anz=2&pos=1.
An unofficial summary of this judgment is available at https://www.wipo.int/wipolex/en/text/596138.