In 1897, Ferdinand Braun published a paper in the journal Annalen der Physik und Chemie describing his “Braun tube”, which was the first cathode-ray oscilloscope.
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In 1903, the first teddy bear was introduced in America. It was made by Morris and Rose Michtom, Russian immigrants and owners of a toy novelty store in Brooklyn, New York.
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In 1972, a U.S. patent was issued for a "Soft Shell Mushroom Shaped Heart" to the inventor Willem J Kolff of Salt Lake City, Utah (No. 3,641,591). He also invented an artificial kidney dialysis machine.
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