1. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

4. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

5. Who invented HIV ?

Answer:

6. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

7. Who invented Nylon ?

Answer:

Wallace Carothers