| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Australia | 2 | |
| #3 | Czechia | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Hong Kong | 2 | |
| #6 | WIPO (World Intellectual Property Organization) | 2 | |
| #7 | Canada | 1 | |
| #8 | EAPO (Eurasian Patent Organization) | 1 | |
| #9 | Mexico | 1 | |
| #10 | Ukraine | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hignett Ian Harold | 16 |
| Publication | Filing date | Title |
|---|---|---|
| HK1070412A1 | Improved pipe joints | |
| GB0428350D0 | Improved pipe connection | |
| GB0426628D0 | Improved pipe joint | |
| GB0227603D0 | Improved casino joints | |
| WO0151840A1 | Screw-threaded pipe joint |