they "renew" by "improving" their existing product enough to make it obsolete, and to get a new patent. Per the article below this has been happening since 1923

they "renew" by "improving" their existing product enough to make it obsolete, and to get a new patent. Per the article below this has been happening since 1923 https://www.hopkinsmedicine.org/news/media/releases/why_people_with_diabetes_cant_buy_generic_insulin https://www.hopkinsmedicine.org/news/media/releases/why_peop...