A temporary sales ban on Samsung Electronics' Galaxy Tab 10.1 tablet computer in the US has been lifted by a US court.
District Judge Lucy Koh's move opens the way for US sales of Samsung's older tablet model to restart.
Separately, Samsung filed a motion on Tuesday against Apple's iPhone 5 saying its patents had been violated.
The iPhone 5 was launched last month and broke Apple's pre-sales record. Apple has not commented on either move.
The South Korean firm said it had "little choice little choice but to take the steps necessary to protect our innovations and intellectual property rights".
Apple and Samsung, the two market leaders in the lucrative smartphone market, are embroiled in patent disputes in as many as 10 countries.