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Cotton Gin
Inventor: Eli Whitney -
Photography
Thomas Edison -
Safety Pin
Walter Hunt -
Steam Locamotive
Inventor: Thomas Scavery -
Dynamite
Alfred Notel -
Telephone
Alexander Graham Bell -
Air Condition
Willis Haviland -
Air Plane
Wilbur and Orville Wright -
Television
Philo Farnsworth -
Frozen Food
Clarence Bildeye -
Tape Recorder
Joseph Begun -
Atomic Bomb
Enrico Fermi -
Polio Vaccine
Jomas Salk -
Telescope
Inventor: Hans Lippershey