I hold four patents, and I worked for a company that produces new products all of the time. Here is the deal. Writing a patent is really tricky, and companies who do this all of the time are REALLY good at "getting around" patents, and finding a way of producing the product (or whatever your patent is on) that does not infringe on your patent, but gets the same end result. I don't mean to sound cynical, but since I earned my patents while working for this company, I know how it works, and I know that when private inventors would come to us trying to sell us their idea, it often did not work out well for the inventor. Companies spend ALOT of money coming up with new ideas, and it really is pretty easy to find a way around a patent that is brought by a private inventor. Get yourself a good patent lawyer who writes patents for big companies. Plan on spending alot of time and money writing a 400 page patent (I'm not kidding, you might also need to get some really creative people involved in coming up with every possible permutation and method of creating your idea or using your idea, that is what I used to do.) That is what we do in the big companies. Big companies take this very seriously, and they will not give you any money for a flimsily created patent that has many "work-arounds" Good luck!