1. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

2. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

3. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

4. Who invented Helicopter ?

Answer:

Igor Sikorsky

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.