| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 29 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Control | |
| #5 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Pistons and sealings | |
| #4 | Venting or aerating devices | |
| #5 | Siphons | |
| #6 | Systems controlling non-electric variables | |
| #7 | Pipes | |
| #8 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dudley William A | 7 |
| #2 | Walton Robert O | 6 |
| #3 | Lamb Roy A | 3 |
| #4 | Paul Lamb Charles | 3 |
| #5 | Robinson Art I | 3 |
| #6 | Crickmer Charles S | 2 |
| #7 | Lamb Charles P | 2 |
| #8 | Kagay Vestal A | 1 |
| #9 | Waring William H | 1 |
| #10 | Robison Jarvis L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3506026A | Valves | |
| US3398760A | Gas lift valves | |
| US3356139A | Pack-off tool | |
| US3326229A | Pressure and time controlled gas lift valve | |
| US3311127A | Gas lift valve having particular piston seal | |
| US3183922A | Gas lift valve | |
| US3311126A | Gas lift valve | |
| US3213806A | Timed flow control method and apparatus | |
| US3218985A | Flow control method and apparatus | |
| US3121442A | Gas lift valve | |
| US3143128A | Gas lift valve | |
| US3092131A | Gas lift valve | |
| US2994335A | Flow valve devices | |
| US2894793A | Well flow valve devices | |
| US2781240A | Piston assemblies | |
| US2707489A | Orifice well testers | |
| US2642812A | Well flow apparatus | |
| US2642811A | Well flow apparatus and system | |
| US2594831A | Well flow device | |
| US2570565A | Anchoring device for well packers |