nintendo have a patent for…wait for it ….side scrolling! (mario)
sega hold a patent for ….. 3D!! (well changing you view e.g. virtua racing)
there is loads of crap like this, but at this stage none of the patents are inforced. all the big companies has there own patent that other big companies are breaking… kind of like a cold war sort of think….just in case
more stupid patents
http://www.eff.org/patent/