| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 3 | |
| #3 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Dredging | |
| #3 | Construction of roads | |
| #4 | Scaffolding | |
| #5 | Foundations and excavations | |
| #6 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cunningham Wesley B | 10 |
| #2 | Cunningham W B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU3639378A | Shaft drilling machine | |
| CA1081684A | Rock drill | |
| US4102415A | Drilling device | |
| US3436121A | Electrically actuated demolition device | |
| US3358779A | Demolition device | |
| US3319724A | Demolition device | |
| US3299968A | Percussion device | |
| US3169376A | Subterranean tunnel liner installation | |
| US3005314A | Method and apparatus for forming tunnels or other underground conduit installations | |
| CA785470A | Demolition device | |
| CA793046A | Percussion device |