Samsung has filed a lawsuit against Ericsson with the US International Trade Commission (ITC), seeking a ban on sales of products manufactured by the Swedish telecoms equipment maker in the US.
Samsung’s move follows Ericsson’s request to ITC to ban US imports of Samsung products, following a lawsuit by Ericsson against the South Korean firm for patent infringement.
Samsung Electronics said in a statement that the firm had sought to negotiate with Ericsson in good faith.
"However, Ericsson has proven unwilling to continue such negotiations by making unreasonable claims, which it is now trying to enforce in court," Samsung said.
"The accused Ericsson products include telecommunications networking equipment, such as base stations."
Another report says that the court filings revealed the patent war involved Ericsson’s claims that Samsung was requesting to cut the fee it paid to license so-called standard-essential patents safeguarding inventions incorporated into broader technologies used across the industry.
However, Samsung argued that Ericsson demanded very high fee to license the patents.
Ericsson’s sales have declined 17% in the third quarter of 2012, and it is turning to the courts to maintain its patent income.
Recently, the European Commission had filed a formal complaint against Samsung for potential misuse of mobile phone standard-essential patents in its ongoing patent war with its rival Apple.