| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 14 | |
| #2 | Canada | 10 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Cranes | |
| #2 | Dredging | |
| #3 | Unspecified technologies | |
| #4 | Unspecified technologies | |
| #5 | Shafts | |
| #6 | Load transportation vehicles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Huston William M | 24 |
| #2 | Jones Cecil E | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2494618A | Operating machinery for load handling equipment | |
| US2479838A | Load handling equipment | |
| US2490132A | Power shovel | |
| US2572029A | Load handling machine | |
| US2440199A | Gantry structure | |
| US2513726A | Load handling equipment | |
| US2458271A | Rotating base for load handling machines | |
| US2509686A | Boom stop for load handling machines | |
| US2445116A | Load handling equipment | |
| US2350762A | Excavating equipment | |
| US2387268A | Crawler drive mechanism | |
| US2354863A | Load handling equipment | |
| US2335858A | High gantry for load-handling machines | |
| US2339700A | Power shovel | |
| CA490137A | Load handling equipment | |
| CA439128A | Load handling equipment | |
| CA416231A | Power shovel | |
| CA464585A | Boom angle indicator | |
| CA452444A | Friction band adjustment device | |
| CA431301A | Crawler drive mechanism |