Dynamite
Kevlar
Polio Vaccine
Assembly Line
Bifocals
3 Position Traffic Signal
Printing Press
Smallpox Vaccine
Cotton Gin
Telegraph
Pasteurization
Phonograph
Alternating Current
Condensing Steam Engine
X-rays
Telephone
Theory of Radioactivity
Steel Plow
World Wide Web
Windshield Wiper
Electric Guitar
Revolver
Safety Razor
Basketball
Cereal Flakes
Picture Click: Click on regions of an image
Forced Order: Answers have to be entered in order
Last Updated: Sep 25, 2017
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