It was analyzed that Humira maintained its patent protection period for at least 42 years and Keytruda for at least 32 years after filing for material patents with the Evergreening patent strategy. Evergreening refers to extending the term of a patent or extending the term of a patent for more than 20 years in the case of a patent to obtain more exclusive rights during the patent protection period. The types of evergreening strategies are representative of salt compounds, solvates, crystalline forms, optical isomers, dosage forms and pharmacokinetic data, manufacturing methods, and uses. Kim Tae-Kwon, responsible for the Korea Institute of Patent Technology Advancement, held on the last day of the 'Bio Korea 2023' event