The Smithsonian’s National Museum of American History and the Lemelson Center for the Study of Invention and Innovation, in collaboration with the U.S. Patent and Trademark Office, will host the 2018 National Trademark Exposition. It will take place Friday, July 27, and Saturday, July 28, from 10 a.m. to 5:30 p.m. in the museum’s first-floor west wing.