Who was "Alexsander Graham bell" and wat did invent ?

Who an eminet sositi , inventor , engeener and inovador . Who is credited with inventing the telephone

Who was "Louis Braille" and wat did he invent ?

He was the inventor of abcedary braille , a sistem for blind or visually impaired people to be a to read and wirrte

Who was "gullemo marconi" and wat did invent ?

was an Italian inventor best known for development of a radio system