Is the QC-HC command copyrighted by SNK?

Hello, FGC; I am new to the forum, but not to fighting games.

Does SNK have their “pendulum motion” commands copyrighted? What is the reason for why only their characters, and not Capcom’s, use quarter-circle, inverse-direction half-circle? Capcom seems lazy in that they assign the “Shinku Hadoken” double QCF for most their characters, including those that use non-projectile supers.


There’s a really good thread for these kinds of kind of silly small questions: FGD Lounge: for general fighting game discussions that aren’t thread worthy