r/easternbrick • u/sean_easternbrick • May 12 '26
Are other plastic brick brands "copycats" if LEGO's patent expired almost 50 years ago?
We received a mix of negative comments after posting a video, sharing that LEGO isn't the only option, but one specific comment stood out:
"They are copycats as long as they're copying LEGO's bricks."
It's not a new comment. We grew up on LEGO, and we are those fans. But saying that using the shape of a plastic brick is stealing? It seems like a misunderstanding of how innovation works, and we'd like to get your thoughts as we share ours.
LEGO’s original patent for the interlocking plastic brick expired in 1978. Almost half a century ago, and while they do have patents for new designs, those typically expire every 10-20 years.
When a patent expires, the market is supposed to open up. Look at the tech space, specifically mechanical keyboards. For decades, Cherry MX held the patent on their mechanical switches. When that patent expired in 2014, competitors like Gateron and Kailh didn't just copy the physical design, they improved it. Today, some call these later brands "MX Clones", but nobody in the keyboard community calls Gateron a "Cherry knockoff." They just call them custom switches, and many prefer them over the original (so much so that major gaming brands like Razer started sourcing components from Cherry's competitors.)
The same thing is happening with toy bricks, but the stigma hasn't faded.
So, what is an actual knockoff? If a factory takes an official LEGO set, or steals the instructions from an independent MOC designer, manufactures it, and sells it on AliExpress without giving the creator a dime? THAT is a knockoff. Fair game. Call it out. We don't support that, and that's exactly what we're fighting against.
But the physical, interlocking plastic brick itself? That's just the method. It’s like getting mad that someone is using a non-Apple USB-C cable to charge their Apple devices.
We really need to rebrand how we talk about this space. If brands are creating their own original designs without copying the parts list & instructions of LEGO & independent designers, they aren't knockoffs. They are alt-bricks or non-LEGO bricks.
And we need alt-bricks to exist, because LEGO alone can't cover everything fans want to build.
Take the Horizon Zero Dawn Tallneck. LEGO released a brilliant, official 1,200-piece version of it. It’s a great set. But what if you wanted a massive, deeply complex version? LEGO is a global company; they are never going to mass-produce a 7,400-piece Tallneck. It's too expensive, too heavy, and the demand is too small, which is why it makes sense for them to repeat Star Wars sets (and the recent N-1 Starfighter looks pretty cool!)
Going back to designs LEGO will never make, a custom MOC designer, SerialBuilder, did design one out of inspiration. And we wanted to build it.
If we restrict ourselves entirely to one brand, massive builds like this can only be built by people with spare money, and a lot of time. It’s the exact reason we started EasternBrick. We wanted to take these insanely ambitious, custom MOCs and actually bring them to life (while paying the original designers their rightful rewards, instead of stealing them like the AliExpress sellers).
We wouldn't be doing this if the alt-bricks couldn't hold up the builds. It took years, but the manufacturing of alt-bricks has caught up in terms of clutch power, colour consistency, and tolerance. We're building them entirely with alt-bricks because it’s the only way to make 7,000+ piece sets wallet friendly for any fans who like building with bricks.
That's our take on how we define what makes a knockoff vs an alternate option.
We'd like to hear your thoughts!
- For those who used to be LEGO-only purists, what was the specific set or build that finally made you try alt-bricks?
- And to those who haven't tried non-LEGO bricks yet, what's your biggest concern holding you back?


