My understanding of the term 'patent troll' is that it only applies to companies that own but do not actually use their patents to bring things to market themse

My understanding of the term 'patent troll' is that it only applies to companies that own but do not actually use their patents to bring things to market themselves. Thus, the companies you mention don't qualify. Not to say that what those companies do is all peaches and cream but it's not patent trolling.