| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 | |
| #2 | Canada | 7 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Materials and metallurgy | |
| #3 | Civil engineering | |
| #4 | Environmental technology | |
| #5 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Dredging | |
| #3 | Metal production and refining | |
| #4 | Preparing clay | |
| #5 | Cranes | |
| #6 | Climate change mitigation in goods production | |
| #7 | Non-metallic elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hadsel Alvah D | 21 |
| Publication | Filing date | Title |
|---|---|---|
| US2750265A | Chlorination apparatus | |
| US2697034A | Chlorination process for treating ores | |
| US2078708A | Ore reducing machine | |
| US2094842A | Ore reducing machine | |
| US2006269A | Ore reducing machine | |
| US2064109A | Ore reducing machine | |
| US1854256A | Rock crusher | |
| US1857539A | Centrifugal rock crusher | |
| US1547385A | Rock crusher | |
| US1086912A | Elevated carrier. | |
| CA145671A | Excavator | |
| CA139789A | Concrete mixer | |
| US1015489A | Excavator. | |
| US1016920A | Concrete-mixer. | |
| CA127170A | Excavator | |
| CA122597A | Elevated carrier | |
| US945939A | Elevated carrier. | |
| CA122511A | Excavator | |
| US909784A | Concrete-mixer. | |
| CA523603A | Chlorination process |