| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Brazil | 2 | |
| #3 | China | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Israel | 2 | |
| #6 | Norway | 2 | |
| #7 | New Zealand | 2 | |
| #8 | United States | 2 | |
| #9 | South Africa | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cox David M | 16 |
| Publication | Filing date | Title |
|---|---|---|
| NZ329212A | Method of horizontal drilling in rock with bit intermittently rotating and having orbital intermittent motion | |
| US5934391A | Sonde housing door hold-down system | |
| US5899283A | Drill bit for horizontal directional drilling of rock formations |