1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Laser ?

Answer:

Charles H. Townes

3. Who invented paper ?

Answer:

Cai Lun

4. Who invented Safety razor ?

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

5. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

6. Who invented HIV ?

Answer:

7. Who invented colour television ?

Answer:

Peter Carl Goldmark