1. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

2. Who invented paper ?

Answer:

Cai Lun

3. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

4. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

5. Who invented google ?

Answer:

Larry Page

6. Who invented HIV ?

Answer:

7. Who invented Safety razor ?

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