1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

4. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

5. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

6. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

7. Who invented paper ?

Answer:

Cai Lun