| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 14 | |
| #2 | Japan | 5 | |
| #3 | United States | 2 | |
| #4 | Canada | 1 | |
| #5 | Germany | 1 | |
| #6 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Materials and metallurgy | |
| #6 | Surface technology and coating |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pipes | |
| #3 | Unspecified technologies | |
| #4 | Metal-working | |
| #5 | Unspecified technologies | |
| #6 | Electrolytic coating production | |
| #7 | Alloys | |
| #8 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ueno Katsuo | 5 |
| #2 | Jones Donald Norman | 5 |
| #3 | Dearden Geoffrey Cave | 5 |
| #4 | Mcgugan John Drummond | 4 |
| #5 | Speare Edward Jeffrey | 4 |
| #6 | Lumsden Norman | 3 |
| #7 | Mcgugan John D | 3 |
| #8 | Phillips Brian Keith | 2 |
| #9 | Buraian Kiisu Fuiritsupusu | 2 |
| #10 | Hignett Ian Harold | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB8512547D0 | Pipe connectors | |
| GB8408705D0 | Pipe connectors | |
| US4547003A | Pipe connectors | |
| GB8300419D0 | Improvements in and relating to pipe connectors | |
| GB8300257D0 | Improvements in and relating to pipe connectors | |
| GB8300092D0 | Improvements in and relating to pipe connectors | |
| GB2125466A | Improvement in and relating to drill pipes | |
| US4298221A | Pipe connectors |