| # | Country | Total Patents | |
|---|---|---|---|
| #1 | WIPO (World Intellectual Property Organization) | 5 | |
| #2 | Republic of Korea | 3 | |
| #3 | China | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Shaping of plastics | |
| #3 | Certain plastics | |
| #4 | Fire-fighting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hayashi Nobuhiko | 10 |
| #2 | Okita Masahiro | 6 |
| #3 | Nakamura Koichi | 6 |
| #4 | Imura Hajime | 4 |
| #5 | Ueno Akira | 2 |
| #6 | Hayakawa Koji | 2 |
| #7 | Kondo Michiaki | 2 |
| #8 | Teramachi Hiroki | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2013183169A1 | Moulding die for coupler and method for manufacturing coupler using same | |
| KR20130058676A | Joint and spacer used therein | |
| WO2012164762A1 | Joint and production method therefor |