1. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

2. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

3. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Television ?

Answer:

John Logie Baird

6. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

7. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.