On June 19, 1970, the Patent
Cooperation Treaty, creating a system of international
patent registration procedures between contracting states.
Learn more about the Patent Cooperation Treaty from the World Intellectual Property Organization.
On June 19, 1953, the execution of Julius and Ethel
Rosenberg in the electric chair at Sing Sing ended one of the most
sensational cases of the McCarthy era. It was the first execution of
civilians for espionage in US history.
Learn more about the trial of the Rosenbergs.