IMDb v DMDb: One Letter’s Difference Not Enough

Zumedia Inc’s attempt to register DMDb as a trade mark in Australia fell flat—thanks to its awkward proximity to a far more famous acronym: IMDb.
Zumedia, a Canadian company behind a digital media platform called “Digital Media Database,” applied to extend its international trade mark registration for DMDb into Australia. But IMDb, the internet’s go-to entertainment database, wasn’t about to let that slide. Backed by nearly 30 years of global use and widespread recognition in Australia, IMDb opposed the extension under section 60 of the Trade Marks Act 1995.
IP Australia sided with IMDb. Despite the difference in the first letter, Delegate Tracey Berger found the marks visually and aurally similar, especially given the overlapping services—both related to searchable databases of entertainment content. Australian users, she held, could easily assume DMDb was affiliated with or endorsed by IMDb.
Zumedia tried to argue that DMDb was a unique acronym and that “Db” simply stood for “database.” Ironically, that only strengthened the opposition’s case: as the Delegate pointed out, consumers often remember brands imperfectly. The shared “-MDb” element was enough to trigger a mistaken belief in a connection.
She also referenced prior cases—including AAMI and Tivo v Vivo—to reinforce the point: when a well-known mark has a strong reputation in the same field, even small differences won’t eliminate the risk of confusion.
The outcome? Extension of protection refused. Costs awarded against Zumedia.
🎬 IP Mojo Takeaway: If your brand sits one letter away from an iconic name in the same industry, don’t count on slipping through. Trade mark law doesn’t look kindly on near-misses that come too close to the main act.
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