Elzie Crisler Segar, known by the pen name E. C. Segar, was an American cartoonist best known as the creator of Popeye, a pop culture character who first appeared in 1929 in Segar's comic strip Thimble Theatre. Charles M. From Wikipedia
Beloved characters like Tintin and Popeye, along with major works by Hemingway, Ravel, and Hitchcock, are now freely available for use after 95 years of copyright protection.