| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 25 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Soldering, welding and flame cutting | |
| #5 | Venting or aerating devices | |
| #6 | Pistons and sealings | |
| #7 | Forging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Howard James H | 21 |
| #2 | Johnson Edwin A | 5 |
| #3 | Mcevoy Jr Joseph H | 2 |
| #4 | Woodward Richard C | 1 |
| #5 | Markins Yeager L | 1 |
| #6 | Humason Granville A | 1 |
| #7 | Mcevey Jr Joseph H | 1 |
| #8 | Mcevoy Joseph H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2211122A | Tubing head and hanger | |
| US2174001A | Manifold tie rod clamp | |
| US2211206A | Method and apparatus for completing a well | |
| US2051713A | Set shoe seal and setting tool | |
| US2031654A | Tubing support | |
| US1947262A | Setting tool | |
| US1931024A | Tubing hanger and casing seal | |
| US2002062A | Well production apparatus | |
| US1952595A | Slip | |
| US2034101A | Well head insert | |
| US1983854A | Well production apparatus | |
| US1942213A | Pipe support | |
| US1928653A | Clinching machine | |
| US1979389A | Pipe engaging slip | |
| US2002012A | Stuffing box for polish rods | |
| US1902075A | Tubing hanger | |
| US1929781A | Casing head valve | |
| US1838401A | Retractable tubing | |
| US1896236A | Retractable tubing head | |
| US2010992A | Valve protecting device |