| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Clutches and brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nixon Jeddy D | 6 |
| #2 | Pearce Louis M | 5 |
| #3 | Church Walter L | 2 |
| #4 | Williams Todd P | 1 |
| #5 | Smith Herbert E | 1 |
| #6 | Grattan Joseph G | 1 |
| #7 | Bowman Archibald M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2021223A | Packing anchor | |
| US1912823A | Setting tool | |
| US1907862A | Pipe adjusting apparatus | |
| US1882230A | Packing anchor | |
| US1855143A | Tongs | |
| US1797964A | Tubing slip | |
| US1992236A | Setting tool | |
| US1873735A | Standing valve | |
| US1848432A | Draw works | |
| US1802786A | Screen support and anchor | |
| US1736009A | Joint-breaking apparatus | |
| US1708322A | Pipe holder | |
| US1836184A | Balanced valve mechanism | |
| US1705583A | Rod hanger | |
| US1659783A | Pipe-holding slip | |
| US1615695A | Joint-breaking apparatus |