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 Automatic rifle ?

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

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913