1. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

2. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

3. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

4. Who invented X-ray ?

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

5. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.