| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Venting or aerating devices | |
| #3 | Pipes | |
| #4 | Unspecified technologies | |
| #5 | Unspecified technologies | |
| #6 | Pistons and sealings | |
| #7 | Siphons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cecil Seamark Lewis Mervyn | 16 |
| Publication | Filing date | Title |
|---|---|---|
| US2814508A | Internal and segmented external pipe coupling sleeves with fluid pressure seal | |
| US2935342A | Pipe coupling with cam tightening means | |
| US2726842A | Gate valves | |
| US2559321A | Casing head equipment | |
| US2573225A | Sealing packing | |
| US2346052A | Valve | |
| US2346051A | Pipe and other coupling | |
| US2246764A | Valve | |
| US2192805A | Casing head equipment for bore holes or wells | |
| US2127312A | Casing head equipment for bore holes or wells | |
| US2035925A | Casing head equipment | |
| US1981431A | Casing head equipment for boreholes or wells | |
| US1959552A | Hydraulic accumulator | |
| US1947622A | Snubbing apparatus for oil wells | |
| US1902906A | Casing head equipment | |
| US1942366A | Casing head equipment |