They certainly make it appear that way, but it's a lie.
I've seen very similar dollies more than a decade ago, as did others in this thread. Their patents are either invalid or cover some minor aspect to make an impression that they invented the three wheeled stair-climbing mechanism.
What they're claiming to have invented is a specific folding dolly that uses the 3-wheel mechanism.
> The UpCart ® line of products solve this problem with a unique line of all-terrain folding carts and hand trucks that have been engineered to reduce effort while going up and down stairs and over irregular terrain
A casual reading of this sentence leaves the reader with the impression that their carts are unique because of how they reduce the effort of going up and down stairs and over irregular terrain. This is corroborated further by other messaging such as their logo.
However, that is a lie. There have been similar other carts with exact same wheel setup.
The only unique part of their product is the folding mechanism, and they are clearly trying to project that uniqueness onto the wheel mechanism. And it will definitely work on people who have never seen such wheel setup before.
Just because you'd prefer others be more stringent with it doesn't mean that everyone else is lying.
A cable package or car loan does not magically become a GREAT DEAL just because a billboard said so. We're just used to constant lies and aggrandizement in advertising, so all that bullshit looks normal, entirely expected now. It's still bullshit though.