| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Civil engineering | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Earth drilling | |
| #3 | Siphons | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | John Penrod | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1983489A | Well pump | |
| US1844261A | Fluid lift for use in wells | |
| US1958016A | Well pump | |
| US1958171A | Well pump | |
| US1958172A | Well pump | |
| US1958170A | Liner pump | |
| US1845182A | Fluid lift for wells | |
| US1845181A | Head flowing fluid lift | |
| US1845180A | Head flowing fluid lift | |
| US1845179A | Hydraulic pump for use in the bottom of wells | |
| US1638876A | Feeding device for cable-drilling tools |