1. Who invented Safety razor ?

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

2. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

3. Who invented Printing Press ?

Answer:

Johannes Gutenberg

4. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

7. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor