I have used the ESP32 in a project for a ham radio application. I have kept all references to RNT in the code and the write up for the project. I am NOT selling the project, but  presenting a write up about it to the ARRL for consideration to be published in one of their magazines. In the text I do suggest those interested in projects like this to buy your tutorial books as they were extremely helpful.
Question, is it OK to proceed with this write up?
Thanks, 
Steve WA3RTC