Jetson's Car vs. Heinkel Car

Several people have told me that Heinkel cars look like something from the Jetsons, the animated 1960’s TV show.  For those who remember the show but not the car, here are some comparison photos:

Car from The Jetson's TV series

The "Family Economy Car"

I can see the resemblance- they both allegedly hold two adults and two children, plus a dog!