https://animpossibleinvention.files.wordpress.com/2015/08/us9115913b1.pdf
Ummm, I’m not seeing any reference to cold fusion in the US patent...
There is no claim of cold fusion in the patent. The explanations, drawings and claims simply describe the device and grossly, describe its construction.
I see no claims or descriptions that tell me what it does except very general description of it as a “heat transfer” device.
More data is needed to know what it means.