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Ivan Terentyevich Kleymyonov (Russian: Иван Терентьевич Клеймёнов; April 13, 1898, Staraya Surava, Tambov Governorate - January 10, 1938), last name also spelled Kleymenov, was a Soviet scientist and one of the founders of the Soviet rocketry.
In 1937, during Stalin's "Great Purge," he was arrested on unknown grounds, sentenced to death and executed based on false confessions coerced from others, including Georgy Langemak. In 1955, he was rehabilitated "due to the lack of a criminal matter" and awarded Hero of Socialist Labor (1991).
- Biography of Kleymyonov (Russian)