1. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

2. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

5. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

6. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

7. Who invented Helicopter ?

Answer:

Igor Sikorsky