1. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

2. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

3. Who invented Transformer ?

Answer:

Ottó Bláthy

4. Who invented Vitamin D ?

Answer:

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

5. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany