| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 26 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines | |
| #4 | Mechanical elements | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pumps | |
| #4 | Venting or aerating devices | |
| #5 | Siphons | |
| #6 | Shafts | |
| #7 | Pistons and sealings | |
| #8 | Vehicle windows, roofs and doors | |
| #9 | Nails |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nixon Jeddy D | 26 |
| #2 | Church Walter L | 2 |
| #3 | Margia Manning | 2 |
| #4 | Lee Clifton H | 1 |
| #5 | Livergood Gerald R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4466779A | Check valve with injector | |
| US2624410A | Apparatus for secondary recovery in oil wells | |
| US2418788A | Apparatus for lifting fluids | |
| US2405324A | System of and apparatus for flowing wells | |
| US2405323A | System and apparatus for flowing wells | |
| US2323839A | Fluid flow control device | |
| US2323838A | Fluid flow device | |
| US2132182A | Stuffing box | |
| US2064267A | Blow-out preventer | |
| US1902885A | Drill | |
| US1873782A | Pump valve mechanism | |
| US1960592A | Blow-out preventer | |
| US1836680A | Slip | |
| US1813193A | Wrist pin | |
| US1797177A | Combination packer and setting tool | |
| US1655236A | Back-pressure valve | |
| US1674055A | Drill stem | |
| US1535336A | Rod protector | |
| US1620222A | Pump | |
| US1555068A | Valve for pumps |