| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Germany | 3 | |
| #3 | Austria | 2 | |
| #4 | United Kingdom | 1 | |
| #5 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hall Elmer D | 2 |
| #2 | Hall Jr Jesse E | 2 |
| #3 | Remp Jr Thomas E | 1 |
| #4 | Brown Robinson W | 1 |
| #5 | Hall John Allen | 1 |
| #6 | Eimer Dwight Hall | 1 |
| #7 | E Hall Jun Jesse | 1 |
| #8 | Love Addison N | 1 |
| #9 | Sen Jesse Elmer Hall | 1 |
| #10 | Fox Roy Kevim Noel | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3380534A | Well bore cleaner and cement disperser | |
| US3148004A | Drill pipe protector | |
| US3080926A | Casing centralizer with replaceable wings | |
| US3028182A | Stop collar | |
| US3072196A | Casing centralizer | |
| DE1166117B | Stop collar |