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Cotton Gin
Eli Whitney invented the cotton gin. -
Electric Battery
Alessandro Volta invented the electric battery. -
Telephone
Alexander Graham Bell invented the telephone. -
Phonograph
Thomas Edison invented the phonograph. -
Incandescent Lightbulb
Thomas Edison invented the incandescent lightbulb. -
Electric Generating Plant
Thomas Edison invented the electric generating plant. -
Internal-Combustion Engine
Gottlieb Daimler invented the internal-combustion engine. -
Radio
Guglielmo Marconi invented the radio. -
Airplane
Orville Wright invented the airplane. -
Assembly Line
Henry Ford invented the assembly line.