1. Who invented Ball-Point Pen ?

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

2. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

3. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

4. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Radar ?

Answer:

Sir Robert Watson-Watt