| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 4 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | China | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Making forged metal products | |
| #3 | Unspecified technologies | |
| #4 | Metal-working | |
| #5 | Venting or aerating devices | |
| #6 | Punching metal | |
| #7 | Frames | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nagayama Yutaka | 13 |
| #2 | Nagayma Yutaka | 1 |
| #3 | Yutaka Nagayama | 1 |