Fig. 6. Number of patent applications by category and country of organoids for a drug screening. The effective patent classification resulted in a total of 335 patents related to a drug screening using organoids. They were divided tissue generation, 3D cell culture method, and tissue or 3D cell culture device/system, using organoids for drug screening, safety evaluation, and efficacy evaluation of drug candidates. The Republic of Korea (KR), the United States of America (US), Europe (EP), Japan (JP), and China (CN).
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