| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | France | 2 | |
| #4 | United States | 2 | |
| #5 | Switzerland | 1 | |
| #6 | Spain | 1 | |
| #7 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schleif Ludwig | 10 |
| #2 | Lobstaedt Kurt | 4 |
| #3 | Lobstadt Kurt | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3744100A1 | WRITING DEVICE IN THE FORM OF A BALLPOINT PEN WITH TWO MINES | |
| DE3510921A1 | Ball-point pen | |
| DE3340293C1 | Writing device, in particular a ballpoint pen, with an integrated stamp device | |
| DE3201235A1 | Ballpoint pen with stamping device | |
| DE2938931A1 | Writing implement with stamp - includes insert with central bore, to accommodate refill or synthetic fibre tip |