I have long believed, based on a non-expert but decent understanding of the tech industry as well as accounting, legal and other allied matters that US patent system is not just ineffective but is basically yet another competitive weapon in the hands of Uncle Sam.
A weapon that is used ruthlessly exploiting the advantage of being the biggest consumer market and economy. That advantage is exploited elsewhere too. While Swiss bankers ask India to go suck its thumb when its govt (half heartedly and selectively, no doubt) asks for details of tax cheats and their holdings in Swiss banks, Uncle is able to squeeze their balls and get the information out.
President Obama's decision to favor Apple over Samsung, despite the outrageous behaviour of Apple on patent matters, that is too well documented to need elaboration, is a case in point.
Here is a President issuing a executive fiat that says when push comes to shove, Apple or for that any American company can rely on its government to save its behind while offering little or no protection to foreign businesses reeling from exploitative, greedy and sleazy lawyers, arrogant big companies and a truly nonsensical patent system. A system that allows patent on ginger, turmeric, basmati rice and other grandma remedies known elsewhere for generations. A system that allows jury to award billion dollar damages without even debating it for a few hours, that too on patents that are dubious and do not stand up to scrutiny by its own system.
America can get away with it. Because it is big. It is as simple as that.