2. _______________ invented the Telephone.

3.____________ invented the Bifocal glasses.

4. _______________________ invented the Dishwasher.

5.Who developed the first waterproof disposable diaper ?

6. Who invented the Mobile phone ?

7. The Printing Press was invented by _______________.

8. ______________________ invented the Air conditioner.

9. Who invented the Airplane ?

10. _____________ invented the Rocket engine.

11. ________________ invented the Richter scale.

12. ____________ invented the Thermometer.

13. The Vacuum cleaner was invented by _____________.

14. Who invented the Xerox machine ?

15. ____________ invented the Stethoscope.