Nokia filed an appeal with the regional court in Mannheim, Germany, in its legal battle with US chipmaker Qualcomm, Nokia, quoted by a Reuters report, said.
The Reuters report said a court last month dismissed the case in which Nokia is challenging Qualcomm patents regarding chips used in Nokia handsets.
The companies have been at legal loggerheads since they failed to renew a key technology licensing pact that expired on April 9, the report said.
If Nokia wins the case on appeal, Qualcomm would be prevented from enforcing its patents that have also been licensed by Texas Instruments, the report said.
Qualcomm has sued Nokia over GSM patents in the US, Germany, France, Italy and China. None of the cases has reached a verdict or settlement, the Reuters report further said.