How do you get a company to sell your invention, but you make all the profit?

Great question! The way to do it is to do the licensing yourself. If you need a book to refer to check this one out by the Ginsu Knife guy who shows you how to do that! http://bit.ly/GinsuKnifeGuy It is a cool deal because he gives you his email and contacts! In this way you can make ALL the profit or make more than 50%! If you do not have a patent or patent pending then you can do that yourself too. See the second video here: http://www.filepatentapplications.com/blog/ to see why.. If THAT clicks with you then you can get the Provisional Patent Video Course here: http://provisionalpatentvideo.com/ A caution about invention companies..... USE WITH EXTREME CAUTION and DO NOT give them money BEFORE they do stuff for you. I have PERSONALLY talked to over 50 people who have been ripped off by even the most reputable firms. It is sad state of affairs with most of them. Also, if you like my comment please remember to vote! Good luck!

You don't - why would they do it for no return?