Who invent sonography ?
Who was Braille?
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Ultrasound was first used for clinical purposes in 1956 in Glasgow. Obstetrician Ultrasound was first used for clinical purposes in 1956 in Glasgow. Obstetrician Ian Donald and engineer Tom Brown developed the first prototype systems based on an instrument used to detect industrial Donald and en an instrument used to detect industrial flaws in ships
Louis Braille was a French educator and inventor of a system of reading and writing for use by the blind or visually impaired. His system remains virtually unchanged to this day, and is known worldwide simply as braille
Louis Braille was a French educator and inventor of a system of reading and writing for use by the blind or visually impaired. His system remains virtually unchanged to this day, and is known worldwide simply as braille
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Ian Donald invented sonography. ...
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