Most Keystone Kops films were made prior to 1918; anything before 1923 is in the public domain.
Abbott and Costello Meet the Keystone Kops - 1955 is rated/received certificates of: Argentina:Atp Australia:G Finland:S Sweden:Btl UK:U
Keystone Kops has: Played Keystone Police Force in "Fatty and the Broadway Stars" in 1915. Played The Police Patrol in "Keystone Hotel" in 1935. Played Themselves in "The Movies March On" in 1939. Performed in "When Comedy Was King" in 1960. Played Themselves in "The DuPont Show of the Week" in 1961. Performed in "The Hollywood Clowns" in 1979. Played Themselves in "Classic Comedy Teams" in 1986. Performed in "Legends of Comedy" in 1992. Played Themselves (2001) in "Slaphappy" in 2001.
Mack Sennett
Copyright protection for the Keystone Kops movies has expired, so the films themselves, and stills thereof, are in the public domain. However, it is possible to register new content in conjunction with them: for example, a compilation DVD of restored/remastered video, with new music, additional material for historical context, and a commentary track by film historians would have a great deal that could be registered.
Abbott and Costello
The cast of When Comedy Was King - 1960 includes: Andy Clyde Keystone Kops Daphne Pollard Dwight Weist as Narrator
Poul Kops was born in 1915.
Erland Kops was born on January 14, 1937.
Erland Kops was born on January 14, 1937.
Frans de Bruyn Kops was born in 1886.
Raquel Kops-Jones was born on 1982-12-08.
Frans de Bruyn Kops died in 1979.