1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

3. Who invented HIV ?

Answer:

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Ball-Point Pen ?

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

6. Who invented colour television ?

Answer:

Peter Carl Goldmark

7. Who invented Helicopter ?

Answer:

Igor Sikorsky