Through-out history there have been many people who have laid claim to inventing something.
I have been told by people that Edison didn't invent the lightbulb...Just for example.
But, like many things, many people have had similar ideas and invented similar tools, machines, etc.
The paralelle bicycle is just another example.
In the end, who sells their product comes down to whoever markets it better (I'm reminded of the Sony Beta, vs the Panasonic VHS - the Sony was a better product, but wasn't marketed as well, so the VHS took hold).
Just another brick in the wall
