| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 7 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | Australia | 3 | |
| #4 | Brazil | 3 | |
| #5 | Denmark | 3 | |
| #6 | Finland | 3 | |
| #7 | China | 2 | |
| #8 | Norway | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 | |
| #10 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ennis Melvyn Samuel James | 25 |
| Publication | Filing date | Title |
|---|---|---|
| GB8808131D0 | Hammer drills for making boreholes | |
| GB8801969D0 | Hammer drills for making boreholes | |
| GB8709571D0 | Borehole drill construction | |
| GB8611091D0 | Borehole drill construction | |
| GB8527581D0 | Hammer for use in a bore hole and apparatus for use therewith | |
| GB8406957D0 | Hammer | |
| GB2117428A | Improvements in or relating to rotary percussion core hammers |