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From my understanding if I manufacture and sell a product publicly before applying for a patent then it can not be patented. If that is the case then does that also prevent anyone else from apply for a patent on the same product which would then prevent me from manufacturing and selling the product. If that is also the case it would not stop them from manufacturing and selling it legally though right?

marked as duplicate by Robert Cartaino Apr 5 '18 at 21:47

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