27753 inventors at Hitachi filed 43299 US patents between 1976 and 2020. These Hitachi inventors belong to 37 different countries.
The donut chart below shares the percentage contribution of inventors from the top ten countries in Hitachi US patent filing.
Countries of Inventors of Hitachi US Patents
| Country | Inventor | Patent | % of Inventors |
| Japan | 26980 | 175787 | 97.21 |
| United States Of America | 446 | 3982 | 1.61 |
| China | 56 | 297 | 0.20 |
| Korea (South) | 52 | 383 | 0.19 |
| United Kingdom | 50 | 193 | 0.18 |
| Germany | 46 | 311 | 0.17 |
| Singapore | 18 | 131 | 0.06 |
| Taiwan | 17 | 95 | 0.06 |
| France | 14 | 34 | 0.05 |
| India | 12 | 25 | 0.04 |
| Netherlands | 7 | 53 | 0.03 |
| Italy | 7 | 21 | 0.03 |
| Hungary | 7 | 9 | 0.03 |
| Ireland | 6 | 8 | 0.02 |
| Switzerland | 5 | 18 | 0.02 |
| Canada | 4 | 72 | 0.01 |
| Czech Republic | 4 | 8 | 0.01 |
| Russian Federation | 4 | 4 | 0.01 |
| Sweden | 3 | 14 | 0.01 |
| New Zealand | 2 | 16 | 0.01 |
| Australia | 2 | 12 | 0.01 |
| Luxembourg | 2 | 7 | 0.01 |
| Brazil | 2 | 3 | 0.01 |
| Spain | 2 | 3 | 0.01 |
| Malaysia | 2 | 2 | 0.01 |
| Jersey | 1 | 22 | 0.00 |
| Belgium | 1 | 16 | 0.00 |
| Jordan | 1 | 10 | 0.00 |
| Thailand | 1 | 6 | 0.00 |
| Denmark | 1 | 3 | 0.00 |
| Chile | 1 | 1 | 0.00 |
| Qatar | 1 | 1 | 0.00 |
| South Africa | 1 | 1 | 0.00 |
| Zambia | 1 | 1 | 0.00 |
| Austria | 1 | 1 | 0.00 |
| German Democratic Republic | 1 | 1 | 0.00 |
| Yugoslavia/Serbia and Montenegro | 1 | 0 | 0.00 |