Let me look - I have a lighted magnifier. Ahh but I don't have atomizers. And on top of that, I am not positive my
batteries are Joye. Pne of my 3
batteries is Joye but one battery is home, as is my Mega xl Joye battery.
What Joye does not have is anything that says "Joye" on the painted parts. If there is anything at all it would be incised in the shiny metal ends, most likely on the atty.
However, there are some "name" brands that say they use Joye (like Volcano brand) and they put their own name on the colored side of one of more parts. But you will find some labeled "name" 510s that are made by SLB or Boge or TNT whatever that is or maybe Smoketech.