From this discussion it seems you don't know the difference between an invention and innovation. An invention is the lightbulb or the first transistor. An innovation is the use of fingerprint sensors in the home button of a cellphone or the retina screen in a laptop. Also the Fusion drive is an innovation by R&D definitions.
So, Apple has introduced many innovations over the years (as did other companies), and they probably made a few small inventions too, but we would only get to know these once they are ready to be patented and implemented into a product.
yeah i undeliberately mixed innovation and invention, my bad.
Yes, they made ipad mini, thinner iphone and macbook with retina display. But can this be really considered as an "innovation"? it's more an evolution of a product than an innovation.