Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5738458 | Liquid-depositing implement for writing, drawing, painting, for cosmetics and the like | — | 1998-04-14 |
| 4759651 | Writing instrument with a signal cap | Christoph Manusch, Gunter Scholz, Udo Obersteller, Heinrich Schoop, Friedrich Dralle +3 more | 1988-07-26 |
| 4587999 | Process for the production of a ball point pen cartridge | Rudolf Boiko | 1986-05-13 |