Yes, I haven’t found any new bicycle technological ideas since around 1900. The only thing I haven’t run across that old is bicycle disc brakes and derailleurs. I bet someone has an early patent for these ideas.
God I feel validated. So it wasn't all rubbish then? Oh look. A bottle of wine. It's red too, the kind I like.
And then there are patents and patents, some international, some not.....that's another rabbit warren.
One thing I am getting from this too, is.........there is a certain pride and Euro bike snobbery.......your example shows some incredible advances that makes this ill placed and without warrant. I have not seen anything like this trawling the French vintage forums - too summerise refined gas pipes and whacky ideas!
Not to forget in a small relative time frame after, Ford appeared around the corner.
I really think your bike demonstrates something of an engineering excellence that the USA had built up, not necessarily a financial venture.