International patenting activities have long been used as an indicator of technology diffusion, but it is unclear whether international patent inflows promote or block technology innovations in recipient countries. Previous studies conclude that the commercial exploitation of patented inventions in foreign countries is expected to be associated with technology diffusion. However, international patents may also block imitations in foreign countries. To address the conflicting arguments, this study investigates the impact of international patent inflows on innovations in recipient countries using the solar PV industry as the empirical focus. This study finds that international patent inflows have a positive impact on innovations in recipient countries, but the positive impact is stronger for leading countries than latecomers. The findings indicate that international patenting activities may exaggerate the technology gap between leading and lagging countries, which suggests the importance of promoting institutionalized technology cooperation between leading and lagging countries.