| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Republic of Korea | 6 | |
| #2 | China | 3 | |
| #3 | United States | 3 | |
| #4 | Taiwan | 2 | |
| #5 | Hong Kong | 1 | |
| #6 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Vehicle brake control systems | |
| #3 | Sewers | |
| #4 | Clutches and brakes | |
| #5 | General building constructions | |
| #6 | Hydraulic engineering | |
| #7 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ikeda Shintaro | 12 |
| #2 | Noda Yuji | 10 |
| #3 | Sugiyama Yoshihiko | 2 |
| #4 | Hatakeyama Ryoichi | 1 |
| #5 | Shintaro Ikeda | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2011074498A1 | Housing type pipe joint | |
| US6371524B1 | Slip-out preventing apparatus for sliding type joint mechanisms | |
| KR20000016449A | Flexible expansion joint | |
| US4838582A | Flexible expansion pipe coupling |