| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 3 | |
| #3 | Australia | 2 | |
| #4 | South Africa | 2 | |
| #5 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Shafts | |
| #3 | Electric switches | |
| #4 | Unspecified technologies | |
| #5 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Masse Roger | 8 |
| #2 | Masse Roger Rue Roussin Thetfo | 1 |
| #3 | Roger F Masse | 1 |
| #4 | Masse Roger F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU7385891A | Drill head with integral impact hammers | |
| AU2511688A | Impact hammer assembly for drilling rock | |
| US4840235A | Impact hammer assembly for drilling rock | |
| US4762188A | Drill bit | |
| CA1261316A | Drill bit | |
| CA1231729A | Method and apparatus for drilling hard material | |
| US4682819A | Method and apparatus for drilling hard material | |
| CA1133954A | Method for drilling hard material | |
| US4252030A | Force converter |