In-N-Out Sues Smashburger Over New Sandwich That Looks and Sounds Like Signature ‘Double-Double’

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To fast-food lovers, the words “Double-Double” and “Triple-Triple” are as synonymous with In-N-Out Burger as freeways and beaches are with Southern California.

Or at least that’s the argument the Irvine-based chain made in a federal trademark lawsuit filed Monday against its competitor, Smashburger.

The suit alleges that the Denver-based chain’s new Triple Double sandwich looks, smells and sounds too much like In-N-Out’s own beloved fare.

In-N-Out argues that Smashburger’s Triple Double infringes on its trademark and dilutes its distinctive quality.

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