In-N-Out sues Smashburger for trademark infringement over 'triple double' burger

There's a burger battle brewing and it involves the iconic In-n-Out 'double double.'

The Denver-based Smashburger' has created a burger it calls the 'Triple double'-- you see that on the right.

In-n-Out says that is just too close to its 'Double double'-- of course everyone knows that's the burger on the left.

So they are suing Smashburger for trademark infringement.

The 'Triple double' was launched in July.

In-n-Out has held a trademark on the 'Double double' since 1963, and has a similar trademark on their 'Triple triple' since 1966.

No comment from Smashburger at this time.

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