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jan 1, 1797 - Karl Heinrich Klingert - Developed a self contained open diving helmet that contains a double hose used for inhaling and exhaling pressurized air

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https://allthingsdiving.com/timeline/diving-machine-klingert/

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Aquatic Science Timeline

ByAllie
18 Aug 2020
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Date:

jan 1, 1797
Now
~ 229 years ago

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