1. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

4. Who invented Safety razor ?

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

5. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

6. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

7. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm