| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 52 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines | |
| #4 | Packaging and shipping | |
| #5 | Mechanical elements | |
| #6 | Measurement | |
| #7 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pumps | |
| #4 | Winches | |
| #5 | Gearing | |
| #6 | Cyclically operating valves | |
| #7 | Pipes | |
| #8 | Unspecified technologies | |
| #9 | Measuring force, work and fluid pressure | |
| #10 | Grinding or polishing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spalding John D | 8 |
| #2 | Joseph Young Forrest | 7 |
| #3 | Mahan Joseph R | 6 |
| #4 | Morgan Jr John Shelby | 5 |
| #5 | Picard John B | 5 |
| #6 | Erwin Rice Allen | 5 |
| #7 | William Long Spencer | 4 |
| #8 | Emanuel Zerbe Lewis | 4 |
| #9 | Murphy Demery A | 3 |
| #10 | Noltein George F | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2047490A | Straight line pumper | |
| US2063160A | Pump plunger | |
| US2030111A | Spider | |
| US2021135A | Rotary power-reversing mechanism | |
| US2023033A | Control head | |
| US2029631A | Swivel | |
| US2033052A | Starter control device for internal combustion engines | |
| US2029598A | Swivel | |
| US2058187A | Spring hook | |
| US2058186A | Spring hook | |
| US2021134A | Rotary power-reversing mechanism | |
| US2032732A | Rotary machine | |
| US2019739A | Rotary machine | |
| US2005123A | Rotary machine | |
| US2043460A | Elevator yoke | |
| US2008646A | Belt tightener | |
| US2019460A | Welded structure | |
| US2048209A | Slip elevator | |
| US2006064A | Nut lock device | |
| US2038149A | Drawworks |