Yes, he did get his Ecat LT (low temp) IP back, then promptly announced there was no longer a demand for it, because his customers wanted to wait for his newer version...the QX I believe it was? The same model the secret customers (still under NDA) have been using for over a year now, that he controls from his portable headquarters. It has a neutron detector on top of it.
Anyway, I believe we had some debate back then if there was any IP to get back from IH? The only approved patent Rossi has is the "Fluid Heater". That patent described one of the many fuels it could run off of, was the "Energy Catalyzer" -which is the real meaning of Ecat. The only other approved LENR patent Rossi had, was his Italian one. I believe he let that one lapse a few years back.
Is it IP, if there is no patent?
For sure there is IP apart from granted patents. It could include patent applications, proto patent material, trade secrets, specific working plans and designs, copyrights, and trademarks. Rossi seemed to want that collective IP back, badly, for whatever reason. I suspect it helps to have IP continuity from past to present in order to properly defend current IP, so that may be one reason.