This subject was analyzed in a 2003 paper Time in Pergatory: Determinants of the Grant Lag for US Patent Applications. The paper was written by David Popp, Ted Juhl and…
On January 10, 2012 IFI CLAIMS Patent Services released its ranking of top global companies based on US utility patents in 2011.
Our IFI analysts work closely with our customers providing them with access to high quality patent data that allows them to develop deep insights into corporate patent portfolios, technology landscapes, and competitive intelligence. While preparing our 2011 Patent Intelligence and Technology Report, we took a closer look at the 2011 US patent grants and in particular the location of the inventors named on these documents. Despite the obvious surge of Japanese, Korean, and Chinese companies in the Top 50 assignees, 50% of US patents in 2011 named US inventors down only 4% when compared with 2001. Patents with Japanese inventors are the second largest group accounting for 20% of US patents in 2011 which is basically the same as 2001. Germany comes in third although dropped from 9% in 2001 to 6% in 2011. Chinese inventors appear in less than 2% of 2011, but this presence has grown by more than 1000% when compared with 2001.