-
telescope
inventer;Hans Lippershey -
cotton gin
inventer;Eli Whitney -
steam locomotive
inventor;Thomas Savery -
photograph
inventor;Thomas Alvo Edision -
safety pin
inventor;Walter Hunt -
dynamite
inventor;Alfred Nobel -
telephone
inventor;Alexander Grayham Bell -
air conditioning
iventor;Willis Haviland Carrier -
air plane
inventor;Orville Wright -
television
inventor;Philo Farnsworth -
frozen foods
inventor;Clarece Birdeye -
tape recorder
inventor;Joesph Begun -
atomic bomb
inventor;Robert Oppen -
polio vaccine
inventor;Jonas Salk -
paper
iventer; Ts`ai Lun
