A deal settles all lawsuits pending outside the US, but US patent lawsuits between the two are unaffected.
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The company is starting an "experimental marketplace" that will allow owners to sell single patents to the search giant.
Nvidia and Samsung have accused each other of infringing patents used in mobile devices, with Nvidia first filing suit against Samsung and chipmaker Qualcomm in September.
A law firm obtains documents that it says reveal potential problems with the US Patent and Trademark Office's covert system for red-flagging controversial applications.
The court rules that Samsung did violate some of Apple's design patents, but finds the Korean company did not copy the overall packaging of the product.
Micron, one of the last holdouts, settles over DRAM memory patents. The deal includes Elpida, a major supplier to Apple.
The Korean electronics giant countersues Nvidia, and drags Nvidia customer Velocity Micro into the fight.
The decision by the USPTO, while relevant to the most recent Apple v. Samsung patent-infringement trial, isn't final and could take months or years to come to conclusion.
A San Jose jury rules against the nonpracticing entity, which had accused Apple of infringing its mobile device technology.