1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

6. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

7. Who invented Atomic Bomb ?

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