1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

3. Who invented Piano ?

Answer:

Bartolomeo Cristofori

4. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

5. Who invented Proton ?

Answer:

Ernest Rutherford

6. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

7. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.