IMO you may be better off framing your previous experience as product management consultation, or just give yourself a product management title at the names of your products/companies, and include revenue/sales figures. In my experience, the "founder" sorts of titles can be a turn off to employers as it might indicate you have high expectations of control or other things that could hinder your organizational conformance if hired.

I once worked with a newly-hired PM who had recently seen a handsome exit from a company he cofounded. By any measure on paper, a very credible and qualified candidate. The development process instituted in our enterprise was a little too rigid for his hardened startup mentality and 2 weeks later, he was let go. Beyond amending your resume with a higher focus on product management, it's important that companies see you as a good fit from process and cultural standpoints.