A deal settles all lawsuits pending outside the US, but US patent lawsuits between the two are unaffected.
Micron, one of the last holdouts, settles over DRAM memory patents. The deal includes Elpida, a major supplier to Apple.
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 U.S. District Court judge said that the companies have "no interest in efficiently and expeditiously" resolving their dispute over Motorola Mobility patents.
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.
Nvidia last month accused Samsung and Qualcomm of ripping off its graphics patents in devices such as the Galaxy Note Edge, Galaxy Note 4 and Galaxy S5 smartphones.
The chipmaker is accusing Samsung and Qualcomm of infringing its patents related to the company's core graphics technology.