On behalf of The Myers Law Group posted in Trademarks on Monday, September 18, 2017. There is a trademark battle sizzling between two hamburger restaurants. On one side is In-N-Out, a long-standing and popular burger joint based in Newport Beach, California. On the other is the up-and-coming Smashburger company based in Denver, Colorado. The hamburger lawsuit This August, In-N-Out filed a lawsuit against Smashburger for trademark infringement. In-N-Out claims it has been using the trademark phrase DoubleDouble to describe its sandwiches since 1963. In 1966, it trademarked the phrase TripleTriple. In-N-Out also holds state and national trademarks for Double-Double, Triple Triple, and Quad Quad burgers, in addition to trademarks 2 x 2 and [...]