| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Dredging | |
| #2 | Cranes | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hetlesaeter Olaf | 18 |
| Publication | Filing date | Title |
|---|---|---|
| US1170905A | Excavating-machine. | |
| US895459A | Excavator. | |
| US868267A | Excavator. | |
| GB190527006A | Improvements in Steam Shovels. | |
| US667315A | Excavator. | |
| US669992A | Excavator. | |
| US669991A | Excavator. | |
| US667314A | Excavator. | |
| US667313A | Excavator. | |
| US665685A | Excavator. | |
| US665684A | Swinging mechanism for cranes. | |
| US667312A | Swinging mechanism. | |
| US665683A | Crane. | |
| US659632A | Excavator. | |
| US665682A | Excavator-bucket. | |
| US649408A | Excavator. | |
| US649245A | Excavator. | |
| US649244A | Excavator. |