1. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

2. Who invented Ball-Point Pen ?

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

3. Who invented Helicopter ?

Answer:

Igor Sikorsky

4. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

5. Who invented Transformer ?

Answer:

Ottó Bláthy

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Java Language ?

Answer:

James Gosling