Summary:
Two patents can be searched on Chinese Intellectual Property Office http://www.sipo.gov.cn against Oakley's Thump mp3 eyeglass and Razrwire sunglasses.
The Chinese patent Nos. 200530061016.5 and 200530059453.3 respectively.
Oakley always liked to suit others, but instead this case it will be suited again, just another hard task after American lawyer Mr. Weyer has launched patent suit against it with a 1990s patent. ( Weyer vs. Oakley link http://www.redherring.com/article.aspx?a=15190 )
Sale of Thump may be deemed an infringement on patents. Be careful.