Kwon, Soonwoo; Lee, Jihong; Lee, Sokbae - 2014
almost 4 million utility patents granted by the US Patent and Trademark Office (USPTO). Our estimation results on patent …, progress has been made in terms of patent quality as well as distance to the frontier. Chinese patents are of higher quality … economies of Europe and Japan have displayed steady decline in their patent quality. Finally, the US has maintained, and in some …
