dan: No, there would not be exclusive rights to the NeoMedia patents by any buyer of the patents or NeoMedia. The obligations of the existing patent licenses transfer to the new owners. Considering Neustar has relicensing rights, there could never be exclusive rights to NeoMedia's patents ever again.
Additionally, the Microsoft license restricts NeoMedia's ability to transfer, sell, or re-assign those patent rights. They can never sell the patents.
“It ain’t so much the things we don’t know that get us into trouble. It’s the things we know that just ain’t so.” Henry Wheeler Shaw