为了维持药品高价，制药公司一直在大量累积专利。
原文：To keep drug prices high, pharma has been piling up the patents
Ars Technica · score 43.9 · 9/28/2026, 12:53:37 PM
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摘要
Add-on patents have increased drug patent periods from two years to over six.
原文摘要：Add-on patents have increased drug patent periods from two years to over six.
原始内容
Add-on patents have increased drug patent periods from two years to over six.