| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 48 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Materials and metallurgy | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Couplings | |
| #2 | Rail vehicle suspensions | |
| #3 | Casting metal | |
| #4 | Unspecified technologies | |
| #5 | Railway brakes | |
| #6 | Foundry moulding | |
| #7 | Vehicle wheels | |
| #8 | Unspecified technologies | |
| #9 | Building materials | |
| #10 | General building constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Washburn Edwin C | 52 |
| #2 | Washburn Alfred F | 1 |
| #3 | Washburn Jr Edwin C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2068831A | Building structure | |
| US1670329A | Method and apparatus for casting ingots | |
| US1552251A | Method and apparatus for making steel ingots | |
| US1626258A | Lever draft gear | |
| US1454357A | Truck bolster | |
| US1490949A | Truck side frame | |
| US1436068A | Coupling yoke and draft attachment | |
| US1462892A | Friction draft gear | |
| US1489404A | Gravity transfer system | |
| US1655078A | Motor-vehicle transmission mechanism | |
| US1411763A | Side-frame and bolster spring bearing | |
| US1443808A | Brake beam | |
| US1367647A | Sealed padlock | |
| US1367645A | Truck-bolster | |
| US1367646A | Truck side frame | |
| US1363939A | Draft mechanism | |
| US1289582A | Axle construction. | |
| US1285504A | Car-axle construction. | |
| US1235744A | Casting apparatus. | |
| US1192024A | Casting apparatus. |