| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | Norway | 4 | |
| #3 | Brazil | 3 | |
| #4 | Australia | 2 | |
| #5 | Canada | 2 | |
| #6 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fuller John Michael | 5 |
| #2 | Barr John Denzil | 3 |
| #3 | Fuller John M | 2 |
| #4 | Barr John D | 2 |
| #5 | Barr J | 2 |
| #6 | Barr D D | 1 |
| #7 | Denzil Barr John | 1 |
| #8 | Fuller J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0058061A2 | Tools for underground formations | |
| AU6681481A | Separating solid from drilling fluid | |
| AU6622681A | Rotary drill bit | |
| CA1166237A | Rotary drill bits | |
| EP0032428A1 | Rotary drill bits | |
| US4397363A | Rotary drill bits and method of use |