1. Who invented Laser ?

Answer:

Charles H. Townes

2. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

3. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

4. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

5. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

6. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

7. Who invented Laptop ?

Answer:

Adam Osborne in 1981.