| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Civil engineering | |
| #3 | Medical technology | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Earth drilling | |
| #3 | Syringes | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | John Penrod | 18 |
| #2 | Thompson Robert D | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1983490A | Pump for use in wells | |
| US1963472A | Fluid motor | |
| US2005299A | Valve assembly for well pumps | |
| US1958015A | Well pump | |
| US1958836A | Well pump | |
| US1679625A | Pump for wells | |
| US1688089A | Pumping equipment | |
| US1636433A | Pumping equipment | |
| US1555230A | Large-capacity well pump | |
| US1672687A | Well pump | |
| US1522075A | Oil-well pump | |
| US1477714A | Tube support for deep-well pumps | |
| US1455851A | Pump swab | |
| US1455850A | Sand swab | |
| US1440100A | Oil well | |
| US1425276A | Well pump | |
| US1440099A | Oil pump | |
| US1413130A | Oil well |