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Assuming I've 3D design (or I've created one) which looks very similar to Lego bricks, I am allowed to 3D print them for my personal use?

Do I need to obtain some permission to do so, because of some patents? Or how does it work?

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    $\begingroup$ I am not sure this is a good question. There seems to be a dislike for law-related issues, and in this case 3D printing seems to have little to do with the issue at hand. There's no difference between this question and "Can I make my own Lego bricks? (using any method)". Votes? $\endgroup$ Jan 13 '16 at 12:36
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    $\begingroup$ I'm voting to close this question as off-topic because meta.3dprinting.stackexchange.com/questions/32/… $\endgroup$
    – A. A.
    Jan 13 '16 at 14:25
  • $\begingroup$ Seriously? This is waaay more a legal question. $\endgroup$
    – Zizouz212
    Jan 13 '16 at 17:12
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    $\begingroup$ I think it's close enough to be ok. $\endgroup$
    – TextGeek
    Jan 13 '16 at 17:33
  • $\begingroup$ This is all focused on patents, and permission, and I don't see this one as a good legal question. $\endgroup$
    – Zizouz212
    Jan 13 '16 at 21:58
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The patents that cover Lego bricks have expired, so you are free to print bricks using the same interlocking system. You are even allowed to offer such prints commercially.

What is not allowed (and a violation of trademark law) is to call them "Lego bricks" or use Lego's logo. "Compatible with Lego" on the other hand, would be fine.

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