I have designed multiple products with functioning prototypes. Im trying to find the best route to protect my work with the least amount of cash out of pocket. I spoke with a patent attorney today. I was quoted around 10k. I could do a provisional patent, "Pat Pend." for 60%. Im confident in the product, but that doesn't mean everyone else will like it. How can I test the waters and protect myself before committing to 10K...?