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Dr. W. Randolph Lovelace with his invention, the high altitude oxygen mask, 1938 - Museum of History and Industry - University of Washington Digital Collections
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Black Inventor Garrett Morgan Saved Countless Lives with Gas Mask and Improved Traffic Lights - Scientific American
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Closeup hands of doctor and assistant holding oxygen mask with patient emergency in the operation room at hospital, surgeon healing and surgery, probl Stock Photo - Alamy
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