1. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

2. Who invented Printing Press ?

Answer:

Johannes Gutenberg

3. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented Java Language ?

Answer:

James Gosling

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.