Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9873551 | Method for producing a partly transparent body with a color gradient, and a partly transparent body with a color gradient | Manfred Martens | 2018-01-23 |
| 8343405 | Method for producing a transparent body that incorporates an object | Manfred Martens, Holger Wuttke | 2013-01-01 |
| D462991 | Writing instrument | — | 2002-09-17 |
| D445454 | Writing instrument | Manfred Martens | 2001-07-24 |
| 6257789 | Writing instrument | Thomas Reichert | 2001-07-10 |
| D443643 | Writing instrument | Manfred Martens | 2001-06-12 |
| 6186687 | Fountain pen | Eckhard Fuchs, Rudiger Weiss, Thomas Klossing, Heino Strehle | 2001-02-13 |