| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 4 | |
| #2 | Canada | 3 | |
| #3 | China | 3 | |
| #4 | Republic of Korea | 3 | |
| #5 | Singapore | 3 | |
| #6 | EPO (European Patent Office) | 2 | |
| #7 | Taiwan | 2 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Inoue Hiroshi | 19 |
| #2 | Takahashi Kiyokazu | 9 |
| #3 | Masui Katsuyuki | 6 |
| #4 | Hagino Tomokazu | 6 |
| #5 | Kiyokazu Takahashi | 2 |
| #6 | Hiroshi Inoue | 2 |
| #7 | Yasuda Akio | 2 |
| #8 | Shibata Takao | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2018011906A1 | Pipe joint | |
| WO2015072379A1 | Pipe joint | |
| TW201418603A | Pipe joint construction |