| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Germany | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Making metal chains | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nutter Orda D | 4 |
| #2 | Mckain Walter P | 2 |
| #3 | Bell Thomas W | 1 |
| #4 | Gage Lonnie L | 1 |
| #5 | Smith Lonzo B | 1 |
| #6 | Keever Joseph W | 1 |
| #7 | Johnson Clyde D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3283837A | Drill bit | |
| US3312292A | Drilling method and apparatus | |
| US2293259A | Device for preventing clogging of drilling bits | |
| US2238895A | Cleansing attachment for rotary well drills | |
| US2253735A | Method of making drill jars | |
| US1914320A | Nonswiveling jar | |
| US1839493A | Fishing tool | |
| US1849433A | Fishing spear | |
| US1498172A | Combination cup and valve fishing tool | |
| US1457596A | Tubing spear | |
| US1445158A | Casing kicker |