1. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented Safety Pin ?

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

4. Who invented Super Computer ?

Answer:

Seymour Cray

5. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist