| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 27 | |
| #2 | Canada | 14 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Transport | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Lubricating | |
| #2 | Rail vehicle suspensions | |
| #3 | Unspecified technologies | |
| #4 | Cyclically operating valves | |
| #5 | Machines | |
| #6 | Pumps | |
| #7 | Railway bodies | |
| #8 | Pipes | |
| #9 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barks Frank S | 41 |
| Publication | Filing date | Title |
|---|---|---|
| US2025632A | Lubricator | |
| US1959517A | Coupler | |
| US1900902A | Coupling | |
| US1805303A | Lubricating system | |
| US1888064A | Lubricator | |
| US1930222A | Lubricating apparatus | |
| US1939943A | Lubricating apparatus | |
| US1767426A | Dispensing apparatus | |
| US1801407A | Valve | |
| US1902750A | Dispensing apparatus | |
| US1858979A | Pump | |
| US1773660A | Lubricating apparatus | |
| US1714122A | Dispensing apparatus | |
| US1733441A | Lubricating apparatus | |
| US1801259A | Motor | |
| US1704238A | Air engine | |
| US1633304A | Lubricating apparatus | |
| US1708781A | Dispensing device for lubricants and the like | |
| US1654673A | Lubricating device | |
| US1667138A | Valve mechanism |