1. Who invented Automatic rifle ?

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

2. Who invented Printing Press ?

Answer:

Johannes Gutenberg

3. Who invented Safety razor ?

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

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

6. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

7. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895