| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | Sweden | 5 | |
| #3 | Republic of Korea | 4 | |
| #4 | WIPO (World Intellectual Property Organization) | 4 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Percussive tools | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lyon Leland H | 18 |
| #2 | Lay Warren Thomas | 11 |
| #3 | Fisher Brandon W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO2011123765A2 | Down-the-hole drill hammer having an extendable drill bit assembly | |
| CA2750810A1 | Down-the-hole drill reverse exhaust system | |
| WO2009124051A2 | Down-the-hole drill drive coupling | |
| US2004084225A1 | Self-retaining downhole-hammer drill bit |