1. Who invented Automatic rifle ?

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

2. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

3. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

4. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

5. Who invented colour television ?

Answer:

Peter Carl Goldmark

6. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

7. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.