| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 132 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Environmental technology | |
| #4 | Engines, pumps and turbines | |
| #5 | Thermal processes | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Railway bodies | |
| #2 | Rail vehicle suspensions | |
| #3 | Unspecified technologies | |
| #4 | Pipes | |
| #5 | Refrigerators | |
| #6 | Internal-combustion piston engines | |
| #7 | Climate change mitigation in transportation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otis Spencer | 31 |
| #2 | Seaberg Frederick | 20 |
| #3 | Neikirk John O | 13 |
| #4 | Zimmerman Robert Montague | 11 |
| #5 | Morey William E | 10 |
| #6 | Hart Harry S | 8 |
| #7 | Caswell William A | 6 |
| #8 | David Hindahl | 5 |
| #9 | Posson Edward | 4 |
| #10 | Yost Winfield Hancock | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US1605347A | Operating mechanism for dump cars | |
| US1626010A | Car | |
| US1605267A | Dump-car construction | |
| US1454786A | Dump-car-door latching mechanism | |
| US1491161A | Shaft-rotating device | |
| US1453836A | Dump-car-door latch | |
| US1472416A | Dump-car-door latch | |
| US1590309A | Dump-car-door-releasing mechanism | |
| US1425767A | Dump car | |
| US1643081A | Door-control mechanism | |
| US1444375A | Mechanism for locking and releasing doors | |
| US1394621A | Door-shaft lever | |
| US1411275A | Railway-car construction | |
| US1446627A | Railway car | |
| US1382191A | General-service car | |
| US1386406A | Door-operating mechanism | |
| US1446621A | Railway-car-door arrangement | |
| US1380377A | Door-operating mechanism | |
| US1445887A | General service car | |
| US1300958A | General-service railway-car. |