Copyright Registrations of Motion Pictures

August 24, 1912—December 31, 1939

Class L, Motion-picture photoplays 35,301

Class M, Motion pictures other than photoplays 15,811

Total 51,112

Class M contains many animated cartoons and newsreels as well as nontheatrical films. The letter P or U has been added to the class symbol preceding the registration number for each entry to indicate whether the respective film was registered as a published or as an unpublished work.