| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | United States | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Norway | 2 | |
| #5 | Canada | 1 | |
| #6 | France | 1 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Ships | |
| #4 | Belts or cables for driving | |
| #5 | Testing of structures | |
| #6 | Measuring temperature | |
| #7 | Special measuring | |
| #8 | Measuring force, work and fluid pressure |
| # | Name | Total Patents |
|---|---|---|
| #1 | Armell Richard A | 3 |
| #2 | Armell Richard Alvin | 2 |
| #3 | Scott Andrew | 2 |
| #4 | Coull David | 2 |
| #5 | Duggan J D | 1 |
| #6 | Van Winkle Denzal W | 1 |
| #7 | Duggan J | 1 |
| #8 | Winkle Denzal Wayne Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0413428A1 | Blowout preventer | |
| GB8800875D0 | Shut-in tool | |
| GB8620212D0 | Downhole pressure & temperature gauges | |
| GB8509326D0 | Centralizing device | |
| US4619322A | Centralizing devices for use down-well | |
| GB2056091A | Leak testing piping | |
| GB2055210A | Leak testing pipes | |
| GB1367358A | Pawls |