Earlier quoted context omitted.
They are legally obliged to for any sales to the US territories. So if you are in the US and buy Minecraft, then they are exporting software to the US and have to comply with relevant law and any trade agreements between Sweden and the US.
First. A company in whatever country is legally obliged only to that country's law. Export means that company is selling something in his jurisdiction to somebody who is not. That somebody is importer. Importer has to comply with the law of the country he/she is importing. One can not expect that exporter burden is to know all UN members laws. Second. There cannot be and there is none agreements between Sweden and US…
Second. That is not how import/export law works. I do not have time to explain how it applies, so Google it.
Third. Your second statement is correct.
Fourth. Your third statement is not correct. Apple can sue HTC in the U.S. b/c HTC does business in the U.S. Apple chose to pursue this case in the ITC b/c it is asignificantly faster way to achieve its business goals (namely, interfering with a competitor's sales of a product). Patent litigation through the court system is a very slow, years-long process, and could take long enough that Apple would be on the down-cycle again.