Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6632041 | Free ink system | Wolfgang Witz, Bernd Bastiansen, Ralf Polley | 2003-10-14 |
| 6322269 | Free ink system | Wolfgang Witz, Bernd Bastiansen, Ralf Polley | 2001-11-27 |
| 6106180 | Handwriting or ink applying device | — | 2000-08-22 |
| 5392520 | Vector brush | — | 1995-02-28 |
| 4930921 | Tubular writting pen with superposed pressure equalization chambers | — | 1990-06-05 |
| 4863168 | Spacers for use as string protectors for tennis, squach and badminton rackets, and device for inserting these parts | Walter Jozat | 1989-09-05 |
| 4854205 | Sign cutting device | — | 1989-08-08 |
| D283907 | Circular spacer inserter for stringed rackets | Walter Jozat | 1986-05-20 |
| 4552483 | Device for covering an oblong opening in a housing | Joachim Brandt, Gerhard Deblitz, Rolf Martens, Rolf Paschen, Bernd Willimczik | 1985-11-12 |
| 4549828 | Writing instrument with separable compensating means | Rolf Tenhagen | 1985-10-29 |
| 4496958 | Drawing pen exchanger for computer controlled drawing machines | Joachim Brandt, Gerhard Deblitz, Jurgen Post, Bernd Willimczik, Rolf Marten +1 more | 1985-01-29 |
| 4489333 | Device for exchanging objects in particular writing instruments | Joachim Brandt, Gerhard Deblitz, Rolf Martens, Rolf Paschen, Jurgen Post +1 more | 1984-12-18 |
| 4459602 | Automatic drafting apparatus | Gerhard Deblitz | 1984-07-10 |
| 4382707 | Felt tip writing pen | — | 1983-05-10 |
| 4356632 | Writing apparatus | — | 1982-11-02 |
| 4221496 | Writing fluid cartridge | Hans-Joachim Ritter, Werner Zuchner | 1980-09-09 |
| D254316 | Ink cartridge with rupturable sealing element | — | 1980-02-26 |
| 4188634 | Method for regulating ink flow in drafting pens | Walter Jozat | 1980-02-12 |