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Lego is off-patent now right? Anyone can make Lego compatible pieces?
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been thinking a lot about how the lego geometry spec can basically fit on one page (not this page mind you, it could be summed up with a few numbers or equations though) lego is a system of constraints that generates a set of affordances
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excerpt from lego patent
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Statistical process control has always been their core defense against competition. Anyone can make blocks where a reasonable proportion of the connections go together right 1-to-1, but the tolerance stack-up within a many-piece model is an absolute nightmare.
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