Fig. 4
From: The worldwide patent landscape of dental implant technology
Global technique development trend. A The annual trend of global patent applications and registrations for 2000 to 2020. Blue lines indicate number of applications and gray lines indicate published patents per year from 01’ to 20’. Gray box means undisclosed period (dark period). B The top 5 global technology development countries: the USA, Korea (south), China, Germany and Japan. App means application, Reg means “registered”. C Intercontinental comparison of the international patent entry ratio versus total applications and registrations. D Comparison of the number of annual applications in the top 3 countries per year from 00’ to 19’