1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

3. Who invented Floppy disk ?

Answer: IBM in 1970

4. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

5. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

6. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori