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Stethoscope and Ear Trumpet - Excerpt from "How Ohio Helped Invent the World"
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Rene Theophile Hyacinthe Laennec, of Paris, invented the first stethoscope in 1816. He chose the name from the Greek words for chest, stethos, and to inspect, skopeein.
Laennec used a hollow wooden tube to listen to the heart.
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Dr. Nathan B. Marsh, of Cincinnati, Ohio was granted the first United States patent for a stethoscope in 1851. His invention contained the first recorded use of a diaphragm chest piece, and was the first commercially marketed stethoscope that used both ears.
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Dr. Marsh’s invention was granted patent #8,591 on December 16, 1851.
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Dr. Nathan B. Marsh's stethoscope would eventually have ear parts added because the tubes had a tendency to slip out of the doctor's ears unless he used both hands.
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Please click on the HOME button to get information on how to order Curt Dalton's latest book, "How Ohio Helped Invent the World".
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 daytondalton@prodigy.net
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