6.Thomas alva edison(1847-1931)
Thomas Alva Edison was born in 1847.He is taken as both scientist and and an inventor.He discovered more than 1000 inventions in his life time.batteries,phonographs,cement,are some of his invention.he improved the telephone made by Grahm bell and invented Kinetoscope for viewing moving film.He also proposed ideas on preserving fruits by keeping them in vacuum.He died in the year 1931.