| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Railway equipment | |
| #2 | Unspecified technologies | |
| #3 | Vehicle brake control systems | |
| #4 | Punching metal | |
| #5 | Sawing | |
| #6 | Railway brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Switzer Ralph V | 5 |
| #2 | Roe Willis E | 3 |
| #3 | Roe Emil W K | 2 |
| #4 | Rosenberg Emil W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4920780A | Hydraulic ram rail bender | |
| US4399893A | Locking wheel block | |
| US3392679A | Railroad car stop | |
| US2901982A | Car replacer | |
| US1900304A | Saw operating mechanism | |
| US1329854A | Car-replacer | |
| US789384A | Car-replacer. | |
| CA584761A | Track level and gauge | |
| CA782828A | Railroad car stop | |
| CA536336A | Car replacers | |
| CA565508A | Car replacers |