1. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

2. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

3. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

4. Who invented Circulation of blood ?

Answer: William Harvey of Britain in 1628

5. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683