The American company Deckers Outdoor, which manufactures the popular UGG shoes, has sued its Australian rival Emu Australia, accusing it of violating trademark rights. It is reported by The Wall Street Journal. A lawsuit filed in California District Court alleges that Emu Australia misled consumers into posing as competitors. The lawsuit claims to ban Emu from using the trademark owned by Deckers. Emu has not yet commented on these claims. Deckers claim to have been producing and selling UGG since they acquired the company in 1995 from Australian Brian Smith, who came up with comfortable sheepleather shoes specifically for surfers.