| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Railway bodies | |
| #2 | Unspecified technologies | |
| #3 | Hinges for doors or windows | |
| #4 | Grinding tools | |
| #5 | Couplings | |
| #6 | Indexing scheme relating to hinges |
| # | Name | Total Patents |
|---|---|---|
| #1 | Elliott Percy M | 17 |
| Publication | Filing date | Title |
|---|---|---|
| US1421431A | Car-door top guide | |
| CA194161A | Car door | |
| US1300143A | Sheet-metal freight-car door. | |
| CA153889A | Car door | |
| US1276738A | Hanger mechanism for car-doors. | |
| US1099919A | Supporting mechanism for freight-car doors. | |
| US1088775A | Freight-car. | |
| US1088774A | Freight-car door. | |
| US1080509A | Draw-bar support for railway-cars. | |
| US1099918A | Freight-car-door mechanism. | |
| US1072590A | Razor-strop. | |
| CA142149A | Door hanger | |
| CA140397A | Car door mechanism | |
| US1025617A | Door-hanger. | |
| US1024502A | Car-door mechanism. | |
| US866118A | Car-door hanger. | |
| CA195998A | Car door hanger |