| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Clutches and brakes | |
| #4 | Machines for making railways | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Brewster Harry C | 12 |
| #2 | Dutherage Charles A | 1 |
| #3 | Glidden Walter L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1873814A | Coupling for drill bits | |
| US1607430A | Casing protector | |
| US1676129A | Drilling machine | |
| US1592133A | Spindle driver | |
| US1572986A | Pipe tongs | |
| US1462098A | Drilling machine | |
| US1449581A | Oil-well-drilling machine | |
| US1233175A | Pipe-coupling. | |
| US1240661A | Fishing-tool. | |
| US1107025A | Tube-gripping apparatus for boring wells. | |
| US1090019A | Well-packer. | |
| US808509A | Railway-rail joint. |