| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Non-positive-displacement pumps | |
| #3 | Unspecified technologies | |
| #4 | Personal adornments | |
| #5 | Fire-fighting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Aladar Hollander | 5 |
| #2 | John Grant | 3 |
| #3 | Smith Nelson K | 2 |
| #4 | Wilson Elihu C | 1 |
| #5 | Forward Walter L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1743348A | Centrifugal-pump assembly | |
| US1696545A | Variable-head centrifugal pump | |
| US1725273A | Automatic control mechanism for fire trucks and the like | |
| US1714784A | Oil-fraction pumping apparatus | |
| US1707613A | Overhung centrifugal pump and gland | |
| US1716906A | Hoist | |
| US1732625A | Bushing and bushing-retaining means for tongs and the like | |
| US1716905A | Well apparatus | |
| US1728930A | Well elevator | |
| US1716885A | Well elevator | |
| US1716886A | Deep-well elevator |