There's almost nothing "secret" about how Microsoft handles patents (you know about it, so do I). What'd be really interesting is actually seeing what Google does with patents. While I've got no paper to prove it, Samsung changed directions in Google's favor massively when Samsung agreed to a long-term patent sharing agreement with them. (Previously, Samsung had been looking more and more like they were going to fork or leave Android entirely.)

I suspect some patent hijinks happened there, and you and I just don't know the details.

You want to talk about secret, ask Google for a copy of the secret contracts every Android OEM is bound to.