Fashion company Burberry has filed a trademark infringement lawsuit against an apparel line owned by Iconix Brand Group in the US, alleging its check pattern has been copied.

Iconix' London Fog brand, acquired last year, is subject to accusations of using a "confusingly similar" pattern to that made famous by Burberry for its trench coats and scarves. The brand's magazine advertising campaign is also accused of being similar to those used by Burberry in the past.

Iconix has defended itself and said it disagrees with Burberry's claims, while Burberry is not making any comment.