It didn't take a lot of googling to come up with this:- Jouta trikes, based at one time in Rotterdam. Tilting rear wheel steering trikes. That's really niche!
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" The best known RWST's have been the Jouta trikes. They were produced successfully for several years.
It is easy to ride on them, thanks to a special patented tilt-steer system. This system makes a tilt with every steering movement. The disadvantage of this tilting system is that there is a
fixed tilting angle for each steering angle. It would be better as this would be speed-dependant (more tilting in the same corner at higher speeds). This trike could be ridden very well, but at higher speeds it can be suddenly unstable. That's one of the reasons why the production was finally stopped.
The trike above is the Jouta SuperTrike. It was made of mould-shaped plastic.
The trike on the right is a later version, the Jouta VX. It was made of steel tubes, and had rear suspension.
More information about these trikes (in dutch, but with lots of well understandable pictures) can be found at the
site of Axel Belinfante."
I think that link above is dead, but there is more out there. I hope I'm not infringing anyone's copyright, but that is a very old source. Good luck in your quest for further information.