1. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented colour television ?

Answer:

Peter Carl Goldmark

4. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

5. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

6. Who invented Super Computer ?

Answer:

Seymour Cray

7. Who invented Ball-Point Pen ?

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