March 22nd, 2017
Statistics from WIPO (attached) show that 28 filers for United States patents had global patent families of at least 10,000 for the period 2010-2013.
Japan No. 1, China No. 2, Korea No. 3: Japan leads the way with more than fifty percent of the 28 countries headquartered in Japan. Japan was followed by China (6), Korea (3) and four with one each, the United States, Germany, Taiwan and Russia.