| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Civil engineering | |
| #3 | Materials and metallurgy | |
| #4 | Engines, pumps and turbines | |
| #5 | Machines | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cranes | |
| #2 | Dredging | |
| #3 | Unspecified technologies | |
| #4 | Ignition for internal-combustion engines | |
| #5 | Winches | |
| #6 | Gearing | |
| #7 | Foundry moulding |
| # | Name | Total Patents |
|---|---|---|
| #1 | Harrington Edward L | 11 |
| #2 | Thompson George F | 3 |
| #3 | Carney Charles A | 2 |
| #4 | Scheloske Carl J | 1 |
| #5 | Williams Gurdon H | 1 |
| #6 | Robin Philip T | 1 |
| #7 | Williams Charle C | 1 |
| #8 | Buoy Chester D | 1 |
| #9 | Robin Philip Theodore | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1822423A | Earth handling structure | |
| US1795760A | Sheave mounting | |
| US1833389A | Clam shell bucket | |
| US1805532A | Clamshell bucket | |
| US1794257A | Clamshell bucket | |
| US1820714A | Drag line bucket | |
| US1695480A | Drag-line excavator | |
| US1767070A | Sheave | |
| US1727825A | Clamshell bucket | |
| US1779702A | Grapple | |
| US1743890A | Bucket-tooth mounting | |
| US1694417A | Floor scraper | |
| US1549538A | Clamshell bucket | |
| US1545099A | Clamshell bucket | |
| US1657926A | Clam-shell bucket | |
| US1604284A | Clamshell bucket | |
| US1545098A | Clamshell bucket | |
| US1027301A | Drag-bucket. | |
| US1029903A | Sparking device for internal-combustion engines. | |
| CA264022A | Clam bucket |