IB Design Technology PreTest

1. Who invented the light bulb?
2. How long did it take from concept demonstration to the tungsten filament light bulb's final form?
3. If the invention is viewed as electric lighting rather than the light bulb, how does it change the above estimate?
4. Who invented the automobile?
5. How long did it take from concept demonstration to the automobile's current form?
6. Does an invention have a final form?
7. Who invented wireless communication?
8. How long did it take from concept demonstration to wireless communication's current form?
9. How close is wireless communication to its fully developed form?
10. Who invented the bicycle?
11. How long did it take from concept demonstration to the bicycle's final form?
12. How long does a patent last?
13. Following concept demonstration, what has tended to be the single greatest barrier to successful commercialization of an invention?