1. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

2. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

3. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

4. Who invented google ?

Answer:

Larry Page

5. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

6. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

7. Who invented Helicopter ?

Answer:

Igor Sikorsky