1. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

2. Who invented Safety razor ?

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

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Printing Press ?

Answer:

Johannes Gutenberg

5. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

6. Who invented colour television ?

Answer:

Peter Carl Goldmark

7. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.