Article Detail Who invented Safety Pin ? Answer: Walter Hunt of U.S.A. in 1849 Similar Questions : 1. Who invented Stethoscope ? Answer: Laennec of French in 1819. 2. Who invented HIV ? Answer: Dr Robert Gallo invented HIV test 3. Who invented Microphone ? Answer: Emile Berliner invented the first microphone in 1876. 4. Who invented Atomic numbers ? Answer: Moseley of Britain in 1913 5. Who invented Diesel Engine ? Answer: Rudoff Diesel of Germany in 1895 6. Who invented DNA Structure ? Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951 7. Who invented Logarithms ? Answer: John Napier (Scotland) invented Logarithm Read more from - Important Inventions