Important Inventions

• 21. Who invented Electron ?

  Thomson. J of Britain in 1897

• 22. Who invented Floppy disk ?

  IBM in 1970

• 23. Who invented Neutron ?

  JAMES CHADWICK in 1932

• 24. Who invented Refrigerator ?

  James Harrison by Alexander catlin in 1850

• 25. Who invented Safety Pin ?

  Walter Hunt of U.S.A. in 1849

• 26. Who invented Safety razor ?

  King Camp Gillette of U.S.A. in 1903

• 27. Who invented Stainless Steel ?

  Harry Brearley of Britain in 1913.

• 28. Who invented Steam Engine ?

  Thomas Savery of Britain in 1698

• 29. Who invented Steam Engine (Piston)

  Thomas Newcomen of Britain in 1712

• 30. Who invented Steam Engine (Condenser)

  James Watt of Britain in 1765

• 31. Who invented watch ?

  Bartholomew Manfredi of Italy in 1462.

• 32. Who invented Transformer ?

  Michael Faraday of Britain in 1831.

• 33. Who invented X-ray ?

  W.K. Roentgen of Germany in 1895.

• 34. Who invented Aspirin ?

  Dreser of Germany in 1889.

• 35. Who invented Chemotherapy ?

  Paracelsus of Switzerland

• 36. Who invented Bacteria ?

  Leeuwenhock of Netherlands in 1683

• 37. Who invented Biochemistry ?

  Jan Baptista Van Helmont of Belgium in 1648.

• 38. Who invented Blood Transfusion ?

  Jean-Baptiste Denys of France in 1625.

• 39. Who invented Morphine ?

  Friderich Sertumer of Germany in 1805

• 40. Who invented Bakelite ?

  Leo H. Baekeland of Belgium in 1907.