>>7864714>>7864714https://www.vennershipley.co.uk/resources/news/2015/06/26/lego-defends-attack-on-its-trade-mark-protectionBest-lock went to trial with LEGO, because they wanted to trademark the 8 stud brick, because the patent was gone...
But they actually copied (actually I believe they pirated) it from Hillary Page toys.
So, as long as you add some Pieces to it, it's not the same as the Trademark, and you're good to go.
I guess?