As someone who doesn't know a whole lot about Bell Labs, its history, how it worked, etc: Why and how did it produce so much great research output? What was different or special about Bell Labs? Answers as well as pointers to other material appreciated!
They had an incentive to doggedly seek IP so that they could remain as entrenched as possible. They didn't plan on actually profiting from it in most cases, they just wanted to be the first ones there so that nobody else could be.