| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Rail vehicle suspensions | |
| #2 | Railway bodies | |
| #3 | Locks | |
| #4 | Unspecified technologies | |
| #5 | Hinges for doors or windows | |
| #6 | Shafts | |
| #7 | Railway brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hopkins James M | 18 |
| #2 | Elliott Percy M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA166117A | Door for freight cars | |
| US1071745A | Sliding-door fastener. | |
| US1053510A | Car-door. | |
| US1021524A | Sliding-door fastener. | |
| US933903A | Car-body. | |
| US926416A | Car-body. | |
| US1069699A | Center-bearing for cars. | |
| US813797A | Railway-car truck. | |
| US811062A | Railway-car truck. | |
| US809505A | Car-truck. | |
| US792040A | Car-door. | |
| US790058A | Brake-beam. | |
| US796652A | Metal car-door. | |
| US768901A | Truck-bolster for cars. | |
| US763978A | Body-bolster for cars. | |
| US730769A | Car-journal bearing. | |
| US663094A | Bearing for car journal-boxes. | |
| CA68376A | Door hanger |