"Stephen, thank you for your valuable tips and insights! I recently filed my first PPA (provisional patent app) and have reached out to a local business about bringing my idea to market. After an initial phone call, I sent an email to the company and was put in touch with a product manager. I contacted the product manager via email and requested an in-person meeting to "pitch" my idea. (I fabricated a very crude prototype that I was planning to use to demonstrate the key functionality.)However, my burning question is when and whether an NDA should come into play. Is this a reasonable thing to request before revealing the details of my idea, or is it unnecessary?Thanks very much for any guidance you can offer.-Steve"