Thomas Alva Edison was an american inventor. He lived in years 1847-1931. He makes a practical electric light bulb, which we uses in our houses every day.
Alexander Bain- give birth to In october in 1811 Watten, scotland and pass away In 2 january 1877 glasgow; mechanic and scottish inventor Telegraph perfected, through introduction of multiple telegraph and printing. It has made new electric clocks too.