1. Who invented Safety razor ?

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

2. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

3. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

6. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

7. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen