1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented Helicopter ?

Answer:

Igor Sikorsky

4. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

5. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented paper ?

Answer:

Cai Lun