1. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

2. Who invented Safety razor ?

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

3. Who invented HIV ?

Answer:

4. Who invented paper ?

Answer:

Cai Lun

5. Who invented Transformer ?

Answer:

Ottó Bláthy

6. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

7. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879