The US International Trade Commission (ITC) has dismissed a complaint by Google-owned Motorola Mobility accusing Apple of infringing on patented technology that makes touchscreens ignore fingers when people are holding smartphones to their ears for calls, reports "ZDNet" (http://tinyurl.com/brycsyv).

The filing by acting ITC secretary Lisa Barton indicated that the investigation into the Motorola complaint filed in late 2010 has been terminated. The ITC reasoned that the technology at issue in the patents wasn't original enough to support the accusation.

This is part of an ongoing battle. Apple has alleged that Motorola infringes 24 of its patents (21 of them with Android-based phones, the remaining three with set-top boxes and DVRs), while Motorola previously asserted 18 patents against a variety of Apple products (mostly but not exclusively iPhone, iPad and iPod). Litigation between the two companies has taken place in several different federal courts.