For every successful invention, there are a dozen unsuccessful and, to put it mildly, unnecessary ones. In this collection, there are some curious photos of inventions that have not become famous. What is the reason for such a failure? Maybe in their complete uselessness? Let’s start with this machine:
And how do you like these skis with a parachute? Judging by the facial expression of this jumper, the feeling is inexpressible 🙂
Ridiculous unusually long trailer
Sausage swimming suit
Vetrobranski glasses are a worthy candidate on our list of failed inventions.
Home hair dryer … Fortunately, a hair dryer was invented a little later, and this buried this unit: 
Skate attachments for shoes:
Gas mask and gas mask for a child:
Unique front seat in terms of safety. It is especially good at damping head-on collisions:
Interesting reading glasses. I don’t even know why this invention failed, at first glance it is quite interesting …
But where the invention of the SUV began. Fortunately, these days they look a little different: 
The list of such inventions can be continued indefinitely, please write about interesting samples in the comments) In continuation, I advise you to visit a selection of inventions for a modern home, with many useful and unusual devices.