1. Who invented Safety Pin ?

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

2. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

3. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

6. Who invented Atomic Bomb ?

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

7. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.