| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Geophysics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grainger Reid B | 3 |
| #2 | Murdock Russell A | 2 |
| #3 | Merritt Floyd C | 2 |
| #4 | Allen Hubert E | 1 |
| #5 | Fay Oliver | 1 |
| #6 | Mckenna John S | 1 |
| #7 | Snyder Leonard L | 1 |
| #8 | Lohman Ralph W | 1 |
| #9 | Mcquiston Armel F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB510587A | Fluid operated latching means for inner drill assemblies | |
| US2122771A | Core catcher | |
| US2153815A | Fluid operated latching means for inner drill assemblies | |
| GB486700A | Improvements relating to core drills for well drilling | |
| US2114056A | Method for electrically investigating subterranean strata | |
| US1893033A | Rock drill | |
| US1907155A | Coring device | |
| US1737256A | Plug for core drills | |
| GB298188A | Double barrel core drill | |
| US1663757A | Standard tool core drill | |
| US1837469A | Core drill construction | |
| US1669098A | Coring device | |
| US1684089A | Coring device | |
| US1604332A | Core retainer | |
| US1624146A | Core drill |