You should read the article you just referenced. Mars got the idea from seeing a similar candy; it does not specify "Smarties". Furthermore, BOTH candies are derivative of a French convection - Dragees - which date back centuries.
Nevertheless, according to the article Allison cites, Mars was granted a patent on his coating, which implies origination of HIS VERSION of the chocolate covered dragee-type candy.
I don't really care; I buy 'em, I counted 'em, (ORIGINAL M&Ms, that is...) I eat 'em, and I like 'em. That's all that matters. OTOH, if one of the Anglophiles wants to send me some chocolate Smarties, I'll be more than happy to um... REVIEW them!
(Once again, I hope everyone realizes that I am arguing this entire discussion with tongue firmly implanted in cheek...)
Doc