| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Switzerland | 4 | |
| #3 | France | 3 | |
| #4 | United States | 2 | |
| #5 | Denmark | 1 | |
| #6 | Netherlands | 1 | |
| #7 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Machine tools | |
| #5 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Vehicle air-treating devices | |
| #4 | Working stone | |
| #5 | Air-conditioning | |
| #6 | Turning | |
| #7 | Parachutes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Boehm Otto | 6 |
| #2 | Otto Boehm | 2 |
| #3 | Scholz Werner | 2 |
| #4 | Boehm O | 2 |
| #5 | Bail Martin | 1 |
| #6 | Werkzeugbau Gmbh | 1 |
| #7 | Bohm O | 1 |
| #8 | Werner Scholz | 1 |
| #9 | Scholz W | 1 |
| #10 | Schneider Franz | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2658826A1 | ROCK DRILLING TOOL, ESPECIALLY FOR DRILLS | |
| DE2358447B1 | Rotary percussive drill with removal grooves - has grooves pitched at forty degrees specified base to shaft stay ratio | |
| US3749189A | Rock drilling bit | |
| US3703214A | Rock drilling bit |