Other than patent trolls. Who is supporting software patents? I understand that big software companies. (IBM, Oracle, Apple, etc) own a large portfolios of pat

Other than patent trolls. Who is supporting software patents? I understand that big software companies. (IBM, Oracle, Apple, etc) own a large portfolios of patents that they can use to defend themselves. But, do they really support software patents or they just use them to play the games they have to play?