| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 48 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Siphons | |
| #5 | Unspecified technologies | |
| #6 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Otis Herbert C | 51 |
| #2 | Luccous John C | 1 |
| #3 | Miller Ira A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2679261A | Pressure responsive valve | |
| US2693819A | Safety control device | |
| US2571478A | Well device | |
| US2566776A | Safety flow control device | |
| US2566775A | Safety control device | |
| US2606616A | Well treating and flow controlling device | |
| US2649914A | Flow guiding device | |
| US2591859A | Gripping device | |
| US2566772A | Safety control valve | |
| US2566774A | Safety control valve | |
| US2566773A | Safety control valve | |
| US2568867A | Well tool | |
| US2588284A | Fluid pressure differential responsive cutoff valve | |
| US2571934A | Pipe cutter | |
| US2393404A | Method and means for flowing wells | |
| US2371840A | Well device | |
| US2343075A | Locking mechanism for well tools | |
| US2348563A | Well tool | |
| US2348564A | Well device | |
| US2255451A | Well device |