| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Materials and metallurgy | |
| #5 | Thermal processes | |
| #6 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Shafts | |
| #3 | Cutting | |
| #4 | Punching metal | |
| #5 | Clutches and brakes | |
| #6 | Iron and steel production | |
| #7 | Furnaces | |
| #8 | Centrifuges | |
| #9 | Gearing | |
| #10 | Vehicle wheels |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cromwell John C | 16 |
| #2 | Koelkebeck Carl W A | 2 |
| #3 | Mehlhorn William M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1471143A | Universal joint | |
| US1473283A | Wheel | |
| US1490592A | Method of making wheels | |
| US1338288A | Open-hearth furnace | |
| US1197348A | Method of sawing and apparatus therefor. | |
| US1186287A | Gang hack-sawing machine. | |
| US1163975A | Universal mill. | |
| US1115786A | Wheel-forging machine. | |
| US1089693A | Driving mechanism. | |
| US1053715A | Bearing. | |
| US856228A | Bearing. | |
| US798324A | Centrifugal liquid-separator. | |
| US837262A | Bearing. | |
| US814023A | Driving mechanism. | |
| US736366A | Bell-gear for blast-furnaces. | |
| US724670A | Blast-furnace top. |