Chris Lattner, Tony Fadell, and Scott Forstall probably count as innovators, and they all left Apple.

Bell Labs was a classic blue sky internal research outfit. Modern corporate culture can't quite handle the concept, so modern R&D is more constrained and "results driven."

There's a critical difference between implementing existing ideas and inventing completely new classes of ideas and devices - like the transistor, or information theory as a discipline.

Modern corps do a lot of the former, but not so much of the latter. Far less than Bell Labs used to.