In early 2019, after McDonald’s sued Irish fast food chain Supermac for trademark infringement, a judge ruled McDonald’s Big Mac trademark was not valid in the EU because they were unable to prove that they had used the Big Mac trademark their. – WTF Fun Facts
Source: https://www.independent.ie/irish-news/tasty-result-for-supermacs-with-david-and-goliath-big-mac-win-37716672.html
WTF Fun Fact – Big Mac Vs. Supermac
there*