| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Mexico | 2 | |
| #3 | Australia | 1 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | Czechoslovakia | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Greece | 1 | |
| #10 | Ireland | 1 | |
| #11 | India | 1 | |
| #12 | Norway | 1 | |
| #13 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #14 | Turkey | 1 | |
| #15 | South Africa | 1 | |
| #16 | Zambia | 1 | |
| #17 | Zimbabwe | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kaalstad Oscar William | 12 |
| #2 | Reid Neil George | 7 |
| #3 | Reid Neil G | 3 |
| #4 | Neil George Reid | 2 |
| #5 | Kaalstad Oscar | 2 |
| #6 | Oscar William Kaalstad | 2 |
| #7 | Auty David H | 1 |
| #8 | Wheeldon Peter G | 1 |
| #9 | Kaalstad Oscar W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4936398A | Rotary drilling device | |
| GB8709437D0 | Rotary drilling device |