If you do not want your product to be copied or "stolen" you need to patent it. I now have over 50 patents to my name as we do not want the product that we come out with copied. There is no theft in copying a product that is out there and no one took the time of effort to patent it, or it has been in commerce for so long that the patents expired. If you couldn't copy a product we would not have anything. Imagine that one day you wake up and invent a cell phone or anything else for that matter and no one could make another cell phone, or maybe you can up with the toilet, or a car, or a refrigerator and just because you were the first one to come up with it no one could ever copy it... We would just have a bunch of monopolies with no product development. The law is on YOUR side if you use it. We usually do not invest in new product unless we can patent it, not worth it for us now.
If you come up with a new product or idea just patent it, costs about $3,000 per product and I can tell you that no one in the US has ever copied a product that we have a patent on. If your product cannot be patented then it means that you copied that idea from an earlier inventor and maybe used it in a new way. Should the guy from Broader not be making a transbrake valve body because he did not invent it and only the original guy that came up with the idea be able to make one? Did he steal the product from the original inventor of the transbrake? Of course not, a transbrake is now old tech that anyone should be able to use.