Article Detail Who invented Atomic theory ? Answer: Dalton of Britain in 1803. Similar Questions : 1. Who invented Dynamo ? Answer: Hypolite Pixii of France in 1832 2. Who invented Periodic table ? Answer: Dmitri Mendeleev invented Periodic Table 3. Who invented Relativity Theory ? Answer: Einstein of Germany in 1905. 4. Who invented Steam Engine (Condenser) Answer: James Watt of Britain in 1765 5. Who invented Penicillin ? Answer: Alexander Fleming of Britain in 1928. 6. Who invented Radar ? Answer: Sir Robert Watson-Watt 7. Who invented Locomotive ? Answer: George Stephenson was first to buit steam locomotives. Read more from - Important Inventions