A liquid-propellant rocket or liquid rocket utilizes a rocket engine that uses liquid propellants.
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invented by Norman Joseph Woodland
A 10-pack of Wrigley’s Juicy Fruit chewing gum is the first product to…
Defibrillator
invented by Naum Gurvich William Kouwenhoven
Defibrillation is a treatment for life-threatening cardiac dysrhythmias,…
Pacemaker
invented by Wilson Greatbatch
A cardiac pacemaker (or artificial pacemaker, so as not to be confused with the…
Crewed Spaceflight
invented by
Human spaceflight (also referred to as manned spaceflight or crewed…
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