| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 | |
| #2 | United Kingdom | 7 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Working stone | |
| #3 | Percussive tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stapf Alfred | 1 |
| #2 | Hundrieser Hans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB171792A | Improvements in or relating to stone drills or augers | |
| GB171468A | Improvements in stone-drills or augers | |
| GB147672A | Improvements in feeds for rotary rock drills | |
| GB147660A | Hollow drills for mining work | |
| GB147707A | Clamping device for mining drills | |
| GB147655A | Drill for mining work with adjustable blades | |
| GB147671A | Core drill for mining work |