| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Engines, pumps and turbines | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Pumps | |
| #5 | Pipes | |
| #6 | Analysing materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lewis James O | 12 |
| #2 | Pierce Homer R | 2 |
| #3 | Dunn Irwin L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2537066A | Apparatus for controlling fluid producing formations | |
| US2111597A | Valve | |
| US2032623A | Valve | |
| US1783441A | Valve | |
| US1791364A | Compressor cylinder | |
| US1791363A | Compressor valve | |
| US1855603A | Pulsing machine | |
| US1803025A | Fire extinguisher | |
| US1688586A | Apparatus for supplying artificial pressure to oil sand | |
| US1680334A | Testing device | |
| US1699244A | Apparatus for extinguishing fires in flow lines | |
| US1676785A | Method of and apparatus for grouting the walls of an oil well |