Important inventions from 1700-2000 By Mutat Period: Dec 1, 1700 to Mar 19, 2010 1700-2010 Oct 20, 1712 SteamBoat was invented Mar 19, 1795 Metric system was invented Mar 19, 1827 Microphone was created Mar 19, 1830 Lawnmower was Invented Mar 19, 1834 Refridgeration was invented Mar 19, 1923 Television was created Mar 20, 1930 Jet Engine was invented Mar 20, 1936 Helicopter Mar 20, 1945 Atomic Bomb was created Mar 20, 2001 I-pod was created by apple Mar 20, 2013 Artifical Heart was invented