S-A-A (V2) hardware is a completely new design from scratch. There is nothing that's bears any resemblance to the edy555 design, except for the use of si5351 to cover low frequencies. We have innovated on several key parts of the VNA design such as the coupler design, and OwOComm will publish all design files in order to render the ideas unpatentable. We don't market or sell these devices, so we are not in control of what trade name they will be sold under (that's up to the distributors), and there is also no registered "NanoVNA" trademark.
OwO