| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Basic materials chemistry |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Clutches and brakes | |
| #4 | Nails | |
| #5 | Lubricating compositions | |
| #6 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Double Edward | 12 |
| #2 | Craig Allen | 1 |
| #3 | Karten Frank J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1210615A | Oil-tight swivel. | |
| US1182533A | Rotary bit. | |
| US1224287A | Rotary bit. | |
| US1014955A | Apparatus for elevating casings. | |
| US862317A | Underreamer. | |
| US820101A | Underreamer. | |
| US808199A | Ratchet-swivel rope-socket. | |
| US796197A | Underreamer. | |
| US748054A | Underreamer. | |
| US727759A | Wire-rope socket for well-drilling tools. | |
| US734833A | Underreamer. | |
| US1143257A | Combined rotary drilling nut and slips. |