| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 5 | |
| #2 | Canada | 5 | |
| #3 | United States | 5 | |
| #4 | South Africa | 5 | |
| #5 | Japan | 4 | |
| #6 | Brazil | 3 | |
| #7 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pearce Richard J | 13 |
| #2 | Bowe James M | 9 |
| #3 | Swartz Richard H | 9 |
| #4 | Pearce R | 6 |
| #5 | Swartz R | 6 |
| #6 | Bowe J | 6 |
| #7 | Grindstaff William C | 5 |
| #8 | Madden James D | 3 |
| #9 | Jerome Robert J | 2 |
| #10 | Madden John D | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US5944122A | Methods and apparatus for controlling an air compressor in a drill string flushing system | |
| US5996444A | Apparatus for unscrewing drill pipe sections | |
| CA1075146A | Well casing perforator | |
| JPS554414A | Implement for opening hole through well casing | |
| AU499088B1 | Well casing perforator | |
| ZA7803143B | Well casing perforator | |
| US3980143A | Holding wrench for drill strings | |
| US3913754A | Portable drill pipe magazine | |
| US3913753A | Drill pipe handling and storage device |