| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 15 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Materials and metallurgy | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Soldering, welding and flame cutting | |
| #2 | Making metal sheets | |
| #3 | Unspecified technologies | |
| #4 | Metal wire processing | |
| #5 | Metal tempering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kin Sogen | 5 |
| #2 | Boku Tetsukei | 3 |
| #3 | Kin Shugen | 3 |
| #4 | Lee Zenichi | 2 |
| #5 | Kin Yotetsu | 2 |
| #6 | Yamaoka Yukio | 1 |
| #7 | Lee Jachyoung | 1 |
| #8 | Kim Yong | 1 |
| #9 | Kim Yoraku | 1 |
| #10 | Song Geun Chul | 1 |