1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

3. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented colour television ?

Answer:

Peter Carl Goldmark

7. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor