| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 20 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Thermal processes | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Iron and steel production | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Pistons and sealings | |
| #5 | Furnaces | |
| #6 | Measuring distances | |
| #7 | Preparation of materials | |
| #8 | Metal production and refining | |
| #9 | Measuring volume | |
| #10 | Details of furnaces |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pieeru Maie | 6 |
| #2 | Edoaru Rugiru | 5 |
| #3 | Rune Maaru | 4 |
| #4 | Jiyan Metsutsu | 3 |
| #5 | Pieeru Meeie | 3 |
| #6 | Reon Urubueringu | 3 |
| #7 | Edouaru Rugiru | 2 |
| #8 | Arowasu Anjieru | 2 |
| #9 | Mishieru Kirushien | 1 |
| #10 | Legille E | 1 |