Apple Inc, which lost the rights to its iPhone trademark in Brazil on Wednesday, is challenging the ruling by Brazil's copyright regulator to prevent local firm Gradiente Eletronica SA from using the "iphone" brand name.

The regulator, Inpi, ruled on Wednesday that the rights to the trademark belong to Gradiente, prompting California-based Apple to request that the decision be reviewed in Latin America's largest market.

Apple Challenges iPhone Trademark Loss In Brazil [reuters.com]