https://www.upcounsel.com/how-to-patent-an-improvement-on-an-existing-product https://www.upcounsel.com/how-to-patent-an-improvement-on-an... https://www.uspto

https://www.upcounsel.com/how-to-patent-an-improvement-on-an-existing-product https://www.upcounsel.com/how-to-patent-an-improvement-on-an... https://www.uspto.gov/patents/laws/patent-terms-extended https://www.uspto.gov/patents/laws/patent-terms-extended There are ways, even if they are not easy or likely to succeed. What I'm referring to are improvement patents. Improvements keep the moat carved out.