1. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

2. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented colour television ?

Answer:

Peter Carl Goldmark

5. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

6. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

7. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.