Cleveland Metroparks sued the Pittsburgh Zoo & PPG Aquarium for trademark infringement and unfair competition Friday in Ohio Northern District Court over its promotion of an Asian Lantern Festival light show. The suit, filed by Thompson Hine, claims that Pittsburgh Zoo copied the idea and the name from an annual event run by Cleveland Metroparks Zoo. Counsel have not yet appeared for the defendant. The case is 1:21-cv-01284, Board of Park Commissioners of the Cleveland Metropolitan Park District v. Zoological Society of Pittsburgh.

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