1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented by Electric Lamp ?

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

4. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

5. Who invented Ball-Point Pen ?

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

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.