1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

3. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

4. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

7. Who invented HIV ?

Answer: