1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

5. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

6. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

7. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams