Braille invented the raised dot alphabet to give blind people the ability to read by touch.
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he invented it when he invented braille.
Because he was "Braillient!" Hahaha Anybody? No? Okay. :(
Louis Braille developed the Braille alphabet over a period of several years, starting when he was a teenager. He began working on it in 1821 at the age of 15 and continued refining it until he published his first Braille book in 1829. So, it took him around 8 years to develop the Braille alphabet.
Louis Braille (as he was called) created a system where each letter of the alphabet was represented by a number of (maximum: 6) dots. For making those dots he originally used a stitching awl.
invertors of braille system