I don't understand. Did you not have company equity in your name? As far as I understand, it would be impossible to acquire the company, its patents, and associated technology without proper paperwork?
We believe what happened is that he tore up my contract without telling me, established a new, clean corporate entity after pushing me out (though my contract was supposedly still valid, it was with the old entity), and simply transferred all intellectual property to the new entity. He kept the name the same but changed it from LLC to a corporation. The acquiring company claims never to have heard my name, other than seeing it on the company's primary patent. It's a big legal mess.
All of these things should have been notarized and filed in the state you formed the LLC in. There are records for all of this, and if the IP was in the name of the old LLC, which you were a Member of, he shouldn't have been able to do any of these actions unless he just forged your signature.
Seems odd to me. Find a lawyer, if you have a convincing case they might work pro bono at first if they can foresee a big payoff.