1. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

4. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

7. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885