| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Flotation | |
| #2 | Unspecified technologies | |
| #3 | Servomotors | |
| #4 | Gearing | |
| #5 | Railway equipment | |
| #6 | Rail vehicle suspensions | |
| #7 | Clutches and brakes | |
| #8 | Milling | |
| #9 | Vehicle wheels | |
| #10 | Locomotives |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruth Jr Joseph P | 11 |
| #2 | Ruth Joseph P | 5 |
| #3 | Brinker Frederic A | 3 |
| #4 | Woelbing George H | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2005562A | Locomotive | |
| US1993808A | Adjusting mechanism | |
| US2001892A | Clutch with synchronizing means | |
| US1991419A | Flange oiler | |
| US1966905A | Bearing | |
| US1963678A | Mine locomotive | |
| US1955979A | Method of ore separation | |
| US1960459A | Method of ore separation | |
| US1974218A | Method of ore separation | |
| US1955978A | Method of ore separation | |
| US2008928A | Method of ore separation | |
| US1933764A | Grinding mill | |
| US1901123A | Flotation machine | |
| US1895523A | Impeller for flotation machines | |
| US1903517A | Cell construction for flotation machines | |
| US1899166A | Flotation machine | |
| CA322328A | Ore flotation | |
| CA331758A | Ore flotation |