S.No.

Discovery/Invention

Scientist

1.   

Wireless Telegraphy

Marconi

2.   

Telephone

Graham Bell

3.   

Telescope

Galileo

4.   

Fountain Pen

Lewis E. Waterman

5.   

Revolver

Colt

6.   

Electric Bulb

Thomas Alva Edison

7.   

Calculating Machine

Pascal

8.   

Type Writer

Sholes

9.   

Helicopter

Brequet

10.   

Petrol Engine

Nicolas Otto

11.   

Diesel Engine

Rudolph Diesel

12.   

Gas Engine

Dailmer

13.   

Gramophone

Thomas Elva Edison

14.   

Microphone

Graham Bell

15.   

Pneumatic Tyre

Dunlop

16.   

Aero plane

Orville & Wilbur Wright

17.   

Motor Car

Austin

18.   

Steam Engine

James Watt

19.   

Magazine of gun

P.Von Mauser

20.   

X-rays

Wilhelm Rongten

21.   

Neutron

Chadwick

22.   

Electron

J.J.Thomson

23.   

Atomic Structure

Bohr

24.   

Railway Engine

Stephenson

25.   

Bicycle

Macmillan

26.   

Safety Razor

Gillete

27.   

Transistor

Shokley & Brattain

28.   

Stethoscope

Rene Laennec

29.   

Sewing Machine

Howe

30.   

Television

J. Baird

31.   

Steam turbine

Sir C. Parsons

32.   

Thermometer

Farenheit

33.   

Printing press

Johann Gutenberg

34.   

Radium

Madam Curie

35.   

Photographic film

Kodak

36.   

Military Tank

Swinton

37.   

Dynamite

Alfred Nobel

38.   

Submarine

David Bushnell

39.   

Jet Propulsion

Frank Whittle

40.   

Pasteurization

Louis Pasteur

41.   

Laws of Gravitation

Newton

42.   

Cinematography

Edison

43.   

Ball point pen

John J. Loud

44.   

Atom bomb

Robert Oppenheimer

45.   

Electric battery

Alessandro Volta

46.   

Homeopathy

Hahnemann

47.   

Insulin

F.Banting

48.   

Lift

Otis

49.   

Machine gun

James Puckle

50.   

Laws of motion

Newton

51.   

Radar

Robert Watson

52.   

Telegraph Code

Samuel Morse

53.   

Steam boat

Fulton

54.   

Radio transmitter

Alexanderson

55.   

Refrigerator

James Harisson & Alexander  Catlin

56.   

Heart transplant

Christian Barnard

57.   

Car (Petrol)

Karl Benz

58.   

Carburetor

Gottlieb Daimler

59.   

Washing Machine

Alva. J. Fisher

60.   

Electric Iron

Henry W. Seeley

61.   

Laser

T. H. Maimah

62.   

Hydrogen Bomb

Edward Teller

63.   

Safety Match

John Walker

64.   

Microscope

Z. Janessen

65.   

Motor cycle

G. Daimler

66.   

Neutron bomb

Samuel Cohen

67.   

Optical Fiber

Narinder Kapany

68.   

Pencil

Jacques-Nicolas Conte

69.   

Transistor radio

Sony

70.   

Transformer

Michael Faraday

71.   

Watch

Bartholomew Manfredi

72.   

Bacteria

Leeuwenhock

73.   

Vaccination

Edward Jenner

74.   

Choloroform

James Simpson

75.   

Asprin

Dreser

76.   

Vitamin A

McCollum & M. Davis

77.   

Vitamin C

Froleich Holst

78.   

Vitamin D

McCollum

79.   

Vitamin B1

Minot & Murphy

80.   

Pencillin

Alexander Fleming

81.   

Artificial Heart

Willem Kolff