A federal jury told Costco to pay Tiffany and Co. $5.5 million in compensation for selling counterfeit Tiffany diamond engagement rings.
Last year, a district judge ruled that Costco had knowingly used Tiffany's trademark by selling rings bearing the luxury retailer's name.
The rings were sold at a hefty discount by Costco.
The wholesaler argued that Tiffany's trademarks were invalid because the name stood for a generic type of ring setting.
Costco ordered to pay $5.5M for selling counterfeit Tiffany's rings
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