1. Who invented Piano ?

Answer:

Bartolomeo Cristofori

2. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

3. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.