1. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

2. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

5. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

6. Who invented Atomic Bomb ?

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

7. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams