Well, that was quite a simple use of dual-screen, but for more complex uses, with each screen being dedicated to separated tasks of a single application or in coordinated applications, industries, computer graphics, universities, research sites and the military, and even brokers, had been using them for years even before that special Game and Watch or dual screen cellphones or some arcade games, so there should be more than enough prior art.
About patents, Ninty isn't a notable culprit about this, but most big companies deserve being patent trolled this way because they're so happy to use these same demented patent laws against competitors.
And sooner or later someone should sue USPTO for the heavy damages its lazy and sloppy patent reviewing system causes.
This said, LOL at people saying others copy Ninty. But also LOL at those saying Ninty copies others. Maybe we won't ever really be able to say who really was the first to use that tech, but surely it wasn't that Texan Mr.Nobody.
Stwike him, Centuwion. Stwike him vewy wuffly! (Pontius Pilate, "Life of Brian")
A fart without stink is like a sky without stars.
TGS, Third Grade Shooter: brand new genre invented by Kevin Butler exclusively for Natal WiiToo Kinect. PEW! PEW-PEW-PEW!