By Marcus Leach
In what is the latest battle to emerge between phone and tablet PC makers Apple have accused HTC of infringing its patents.
Apple have filed a complaint against the smartphone maker with the US International Trade Commission asking for an inquiry into the matter.
This follows Apple's recent coming together with Samsung, both accusing the other of copying designs and technology.
HTC, the world's third-biggest mobile phone maker by stock market value, has strongly denied all allegations.
"HTC is dismayed that Apple has resorted to competition in the courts rather than the market place," said Grace Lei, HTC's general counsel.
Apple has, for a long time, been the market leader in smartphone and tablet
markets, with their iPhone, iPad and iPad 2.
In a tit-for-tat battle Apple first accused HTC of infringing up to 20 of their patents, only for HTC to counter claiming Apple was guilty of infringing their own patents.
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