Does misappropriation law still live?

"I've been ripped off! Surely I can sue for something!" Intellectual property lawyers frequently encounter indignant clients in this situation: A rival has blatantly piggybacked off their work, but the client didn't obtain patents, there's no apparent copyright infringement, trademarks and trade dress aren't at issue, and there was no trade secret misappropriation or breach of contract—just imitation and free riding.

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