| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Lubricating | |
| #2 | Pumps | |
| #3 | Cyclically operating valves | |
| #4 | Transferring liquids | |
| #5 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Woodruff Joseph W | 15 |
| Publication | Filing date | Title |
|---|---|---|
| US2012031A | High pressure greasing control valve | |
| US1943102A | Grease pumping apparatus | |
| US1804449A | High pressure lubricating apparatus | |
| US1813982A | Cut off valve | |
| US1761423A | Pressure grease measuring and distributing apparatus | |
| US1782704A | Oil-measuring apparatus | |
| US1804582A | Pressure greasing apparatus | |
| US1689270A | Pump | |
| US1639017A | Automatic force-feed lubricator | |
| US1689269A | Pump | |
| US1630321A | Force-feed lubricator | |
| CA285491A | Pump | |
| CA271750A | Force feed lubricator | |
| CA285492A | Pump | |
| CA351794A | Grease pump |