| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 13 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Dredging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Choate Roy E | 5 |
| #2 | Austin Ellsworth Welles | 4 |
| #3 | Rodler Waldo E | 3 |
| #4 | Rockwell Harvey W | 2 |
| #5 | Austin Elsworth W | 1 |
| #6 | Austin Ellsworth W | 1 |
| #7 | Lewis Fredrick G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1597382A | Wheeled scraper | |
| CA342470A | Hydraulic control device | |
| CA442762A | Bulldozer | |
| CA342471A | Earth moving device | |
| CA333072A | Vehicle track shoe | |
| CA333071A | Vehicle track shoe | |
| CA381168A | Earth mover | |
| CA411941A | Excavator | |
| CA337683A | Earth moving device | |
| CA410867A | Earth mover | |
| CA335265A | Draft appliance | |
| CA409354A | Excavator | |
| CA378811A | Earth moving device | |
| CA444446A | Hydraulic system |