Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7909525 | Article, in particular a writing implement, having a gripping zone with raised structures | Gerhard Lugert | 2011-03-22 |
| 4532276 | Writing fluid | Lydia Sollner, Richard Wethey, Ilse Otte | 1985-07-30 |