| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Engines, pumps and turbines | |
| #4 | Mechanical elements | |
| #5 | Electrical machinery and energy | |
| #6 | Control |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pumps | |
| #4 | Venting or aerating devices | |
| #5 | Systems controlling non-electric variables | |
| #6 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Roach Erskine E | 8 |
| #2 | Lilly Mason M | 3 |
| #3 | Baker Ivan W | 1 |
| #4 | Love Addison N | 1 |
| #5 | Jun Charles Beverly Wright | 1 |
| #6 | Mcmurry Everett D | 1 |
| #7 | Wright Jr Charles B | 1 |
| #8 | Lilly Mason Manuel | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3306312A | Pressure regulator | |
| US3329211A | Paraffin control device | |
| US3211179A | Time cycle controller | |
| US3139040A | Gas lift system for wells | |
| DE1143769B | Removable gas lift valve arrangement | |
| US3089545A | Collar stop | |
| US3053323A | Retrievable gas lift apparatus | |
| US3026903A | Magnetic check valve | |
| US3020852A | Plunger lift for wells | |
| US3031971A | Plunger lift control apparatus | |
| US2939475A | Magnetic check valve | |
| US2852080A | Chemical injector for well tubing | |
| US2878754A | Fluid lift plunger for wells |