1930s car navigation and videophone

"Iter Avto." a device invented in Italy in the 1930s, which was a mechanical design. A paper map was placed in a box and moved according to the speed of the car. Manual scrolling was required for user searches.

1930 - The video telephone is shown to the public for the first time in New York City. The connection established between Bell Laboratories and AT&T allowed the interlocutors not only to hear but also to see each other on tiny black and white screens, and then we can find video telephones among the advertising materials of the 1960s.

It would seem that here are the inventions, you can refine them a little and sell them to people, but after the discoveries were made, scientists were in no hurry to refine them. The navigator was connected to the steering wheel only 50 years after it was invented