| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 11 | |
| #2 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Turning | |
| #2 | Earth drilling | |
| #3 | Percussive tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wezel Erich | 12 |
| #2 | Theiss Werner Dipl Ing | 5 |
| Publication | Filing date | Title |
|---|---|---|
| DE3938689A1 | Collet chuck for machine tool spindle - has collet seated in sliding cup that can be forced forward to clamp tool without torsion | |
| DE3705717A1 | Box countersink or hollow drill bit and production process for this | |
| DE3637456A1 | Hollow drill bit | |
| DE3619334A1 | Hollow drill bit crown | |
| DE3610671A1 | Drill chuck | |
| DE3538237A1 | Trepanning bit | |
| DE3338422A1 | Hammer-action drill chuck | |
| DE3222399A1 | Quick-action chuck for clockwise/anti-clockwise rotation | |
| DE3115664A1 | Chuck seal | |
| DE3114503A1 | Quick-action chuck II | |
| DE3014019A1 | QUICK CHUCK |