| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Transport | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Transport or storage devices | |
| #3 | Wing fittings | |
| #4 | Railway shifting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Merritt Glenn W | 7 |
| #2 | Nolan James A | 4 |
| #3 | Bower Ralph J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2456209A | Car-dumping apparatus | |
| US2468303A | Trip feeder | |
| US2407569A | Car-dumping apparatus | |
| US1977396A | Car door opener and closer | |
| US1934869A | Cage, lander, and gate combination | |
| US1885277A | Cace lock | |
| US1735778A | Rotary car dump | |
| US1301732A | Safety device for mines. | |
| US1337943A | Safety device for mines | |
| CA216510A | Mine car cager | |
| CA216509A | Mine car cager |