Drive thru windows
Car wash
I assume you include all vehicles with an internal combustion engine. Trucks, buses, ambulances, fire engines, trains other than steam engine ones. That's a long list. Look at the world at the time of the Civil War and you would have a good idea where we would be.
paved roads
They aren't; such inventions would be protected by patent law.
it is help full because now we can fly around the world with out using a car
Car's, Taxi's and Buses
car :)
No, If a car moves around a circular race track with any constant speed, the acceleration is directed towards the centre. So it has a centripetal acceleration. The tangential acceleration would be irrelevant unless the car has an instantaneous tangential velocity of zero. Then the centripetal acceleration is zero. However, this would only exist for that small instant in time.
there should be a flying car
refrigerator car
car spotlights,
you will pay the balance that car would be worth unless it wasw reported stolen real early/ before repo
Well, one of Henry Ford's inventions was a different type of car (the first type of car was invented by Old -->Oldsmobile), so you can probably guess how that affected America.
There where many inventions in the 1920s as it was a time of change but 2 big ones are the car and insulin. I also think that crayobs were invented in the 1920s.