No. of top 10 companies in each category by country

U.S. companies dominate in terms of quality(Note 3)The quality rankings were compiled by analyzing patents filed with the patent offices of Japan, the U.S., the EU and the World Intellectual Property Organization. Quality was evaluated based on original astamuse indexes gauging the number of applications around the world, examiner citations of existing technology concerning novelty and inventiveness, time remaining until a patent expires and how promising the technology is.. Among the 100 companies that made it into the top 10 of all categories, 64 are American. 18 are Japanese, and eight are South Korean. China had only one company show up in the ranking, in the drone category.