Ripping off Calvin and hobs sure but not Lego. https://en.wikipedia.org/wiki/Hilary_Page#Kiddicraft https://en.wikipedia.org/wiki/Hilary_Page#Kiddicraft LEGO

Ripping off Calvin and hobs sure but not Lego. https://en.wikipedia.org/wiki/Hilary_Page#Kiddicraft https://en.wikipedia.org/wiki/Hilary_Page#Kiddicraft LEGO is based off of earlier designs of interlocking bricks, they are well known because they got really good at affordability, high tolerances, and durability not because they invented the concept. Beyond that the original functional patents have long expired.