| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 3 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | South Africa | 2 | |
| #6 | China | 1 | |
| #7 | Finland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Civil engineering | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Percussive tools | |
| #3 | Cooling of machines | |
| #4 | Starting of combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Edlund Hans E | 9 |
| #2 | Haines Marvin L | 5 |
| #3 | Campbell Paul | 4 |
| #4 | Curington Alfred R | 1 |
| #5 | Edlund Hans F | 1 |
| #6 | Wireman Alonzo | 1 |
| #7 | Edlund H E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA2177864A1 | Heat controlling system for cold weather engine operation | |
| CA2190248A1 | Reverse percussion device | |
| CA2172802A1 | Drill automation control system | |
| ZA9405056B | Impact hammer | |
| US5413186A | Reverse percussion device | |
| US5358058A | Drill automation control system | |
| US5398772A | Impact hammer | |
| US4278135A | Variable volume pneumatic drill |