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I think it was Mc Donalds saying that "Supermac" as a restaurant name had infringed on "Big Mac" as a burger and brand but they had instead responded with removing the Big Mac trademark presumably as a punishment for repeated failed attempts at tenuous links. Mc Donalds have a shocking number of patents and trademarks even attempting to patent the way people squirt ketchup into burgers, courts must be fed up with them attacking medium-small competitors.
And this:
https://www.theguardian.com/business/2019/jan/15/mcdonalds-loses-big-mac-trademark-legal-battle-supermacs
This is odd, though:
Obviously it's not used as a restaurant name, but as the best-known burger at McDonald's surely it should be a doddle to prove on appeal. Not that it's important in this case, as the quarrel is about a restaurant name.