Heimlich invented the chest drainage flutter valve (also called the Heimlich valve), and was granted a patent for the device in 1969
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Heimlich invented the chest drainage flutter valve (also called the Heimlich valve), and was granted a patent for the device in 1969
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-23 from Wikipedia. The archived copy is preserved so this citation survives link rot.