I am aware that I can't patent an idea that is public domain. I would be violating the "novel, useful, and non-obvious" patent qualification. I will be doing all the hard work in creating this product. Although I can't patent the idea, I am free to manufacture and sell the product since no patent was issued. If this idea has been publicly disclosed for over a year, am I free and clear from anyone claiming the idea and suing me for infringement down the line when I become successful? Am I also protected from international patents that did not file in the USA during the priority filing grace period of one year? This idea has been talked about for years and disclosure is stricter in other Countries, so I doubt there is an international patent but I want to cover my angels.