US patent trolling is a farce.

Abuse of privileges inevitably brings loss of freedom and rights.

But try telling that to the robber barons of WS who invariably funnel buckets of swill to the great brainwashed so that they believe that any regulation is the bane of any bureaucracy, which they also malign as was McCarthy's "pinko" commies, or as is-now-styled "Euro-socialists".

Meanwhile, the bureaucracy suffers in silence, having committed no crime other than if being the victim of political agendists' calling the kettle black.

so they include almost all tech company but IBM, maybe they didnt want to start a patent war

...and all of those companies listed are also patent trolls. The only way the US is going to reform its ridiculous and antiquated patent laws is if these kinds of lawsuits keep happening. When enough big players get hurt, maybe then we'll see some changes in congress.