| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United States | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | United Kingdom | 1 | |
| #5 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Turning | |
| #2 | Unspecified technologies | |
| #3 | Earth drilling | |
| #4 | Working stone |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kersten Heinrich | 11 |
| #2 | Precht Hartmut | 8 |
| #3 | Kersten Heinrich Dipl Ing | 2 |
| #4 | Precht Hartmut Dipl Ing | 2 |
| #5 | Heinrich Kersten | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE10152446A1 | Method for producing drill hole in concrete, ceramic etc involves first drilling smooth hole with drilling head aligned coaxial with drilling tool and then through eccentric revolving spindle parallel to itself to produce rear cut section | |
| DE19964272C2 | Drills, in particular rock drills | |
| DE19944406A1 | Rock drill | |
| DE19841978A1 | drill | |
| DE19516270C1 | Drilling tool | |
| DE4401914A1 | drill | |
| DE4401915C1 | Hammer drill with plate |