It's a great "revolutionary" devise he believes would have been a disruptive technology in this particular industry, I totally agree. Indeed, I decided to assist in creating a company plan. Thus, I am going to print out the data we discussed in emails and make contact with calls, and look at it and make use of that material in the industry plan, where they fit.
Since this all is preliminary, there's nothing absolute, it makes sense to maintain all of the notes, and from take a look at others in the market. In addition, it is practical to use "discreet manufacturing" tips for the very first prototypes, and make use of an LLC name that looks just like you are doing something else makes sense; in cases like this, perhaps, an LLC that suggests something totally un-related.
By doing this when you get a shop somewhere, who'll understand what the hell you are doing until you roll-up the entranceway eventually to demonstrate the world; remember; "Loose lips sink ships!" The truth is, creating a new invention means you have to keep your information near to the vest when you design, build, and acquire your patent work in order. If you be discreet rather than enable your enthusiasm to cause you to go and tell everyone your work, you'll be far better off in the long run. Please consider this all.