| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 6 | |
| #2 | United States | 3 | |
| #3 | Sweden | 2 | |
| #4 | South Africa | 2 | |
| #5 | Austria | 1 | |
| #6 | Canada | 1 | |
| #7 | Czechia | 1 | |
| #8 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Percussive tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walter Hans-Philipp | 14 |
| #2 | Buczeck Ralf | 3 |
| #3 | Buczek Ralf | 1 |
| #4 | Walter Hans-Phillip | 1 |
| #5 | Walter Hans Philipp | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0978625A2 | Percussive drill | |
| EP0837214A2 | Percussive drill | |
| EP0658681A2 | Drill hammer | |
| EP0465864A1 | Drill hammer control valve | |
| EP0154778A1 | Percussion drill | |
| DE2816737A1 | DRILLING HAMPS, IN PARTICULAR DEEPHOLE HAMMER | |
| US4043409A | Drill steel for deep drill hammers | |
| US4049065A | Drilling apparatus |