This alleged control of this type of in app payment has prevented several European games developers launching their apps stateside.
“The US patent system allows software implementations of ideas to be patented, which differs significantly from the European Union, although the European Parliament has been considering aligning patent rights with the US,” according to Start up Smart, a website for new businesses and entrepreneurs.
“The growth of lawsuits in the US by so-called “patent trolls” – which simply demand payments after assessing intellectual property rights – poses a major threat to the burgeoning mobile app market.”
Source: Telegraph News