InterDigital has alleged that Nokia infringed in two of its 3G wireless patents. The Pennsylvania-based company has accused Nokia of engaging in unfair trade practice by selling its 3G handsets in the US. It has asked the ITC to bar Nokia from importing phones with the contested technology into the country.

Among the phones that InterDigital claims infringe its patents is Nokia’s N75.

Separately, Nokia had asked the ITC, in mid-August, to ban the import of phones containing Qualcomm chipsets that it alleges infringe on five Nokia patents.