I'm not a backer, but if I was, I think I'd be angry because it seems like he delayed delivery for a very long time while using the backers' money to fund development of intellectual property and pay lawyers for patent applications. Was any of that in the Kickstarter presentation?

Seems like he could have built and delivered the bikes sooner simply by foregoing his IP goals and not turning his backers into unwitting and unrewarded venture capitalists.