| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machine tools | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Changing non-ferrous metals | |
| #2 | Alloys | |
| #3 | Unspecified technologies | |
| #4 | Forging | |
| #5 | Making metal sheets | |
| #6 | Rolling metal | |
| #7 | Casting metal | |
| #8 | Making forged metal products | |
| #9 | Nails | |
| #10 | Making screws |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kawabe Nozomu | 12 |
| #2 | Oishi Yukihiro | 12 |
| #3 | Inoue Ryuichi | 5 |
| #4 | Mori Nobuyuki | 5 |
| #5 | Ito Masahiko | 2 |
| #6 | Fujii Masaaki | 2 |
| #7 | Fukuda Kenji | 2 |
| #8 | Hashimoto Kenzaburo | 2 |
| #9 | Takahashi Hitoshi | 1 |
| #10 | Kitamura Takahiro | 1 |