| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Dredging | |
| #3 | Venting or aerating devices | |
| #4 | Unspecified technologies | |
| #5 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hosmer Chester C | 11 |
| #2 | Wines Carleton H | 2 |
| #3 | Furman Samuel E | 1 |
| #4 | Launder Ernie L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2251487A | Tooth point | |
| US1970964A | Means for stopping the flow of fluids under pressure | |
| US1788057A | Blow-out preventer for oil wells | |
| US1635749A | Blow-out-preventer attachment for casing heads | |
| US1662707A | Casing head | |
| US1645428A | Oil-well-plunger attachment and sucker-rod connection | |
| US1623010A | Oil-well casing head | |
| US1777564A | Blow-out preventer for oil wells | |
| US1508882A | Rotary-drill pipe slip | |
| US1525582A | Packer for oil wells | |
| US1414951A | Rotary drill-pipe slip |