1. Who invented Automatic rifle ?

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

2. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

3. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

4. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

5. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

6. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

7. Who invented Laser ?

Answer:

Charles H. Townes