| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Engines, pumps and turbines | |
| #3 | Measurement | |
| #4 | Mechanical elements | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Venting or aerating devices | |
| #5 | Measuring force, work and fluid pressure | |
| #6 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Herbert Allen | 11 |
| #2 | Abercrombie James S | 3 |
| #3 | Tennant Joseph A | 2 |
| #4 | Works Madden T | 1 |
| #5 | Stephens Charles D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2297679A | Pressure gauge | |
| US2312787A | System of gauging pressures | |
| US2246772A | Pump | |
| US2192425A | Valve guide | |
| US2297678A | Pressure gauge | |
| US2179003A | Liquid pressure adjustable relief valve | |
| US2141847A | Relief valve | |
| US2117783A | Pipe holding device | |
| US2184231A | Slip | |
| US2143399A | Pump valve | |
| US2105067A | Pump | |
| US2085286A | Pump | |
| US2102665A | Pump | |
| US2092629A | Pump | |
| US2071375A | Relief valve | |
| US2088042A | Pumping member |