Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5172995 | Plotter pen with coaxial reservoir | — | 1992-12-22 |
| 5067839 | Stylo pen tip and auxiliary removing tool | — | 1991-11-26 |
| 5004365 | Drop-weight and tubular writing instrument | — | 1991-04-02 |
| 5000606 | Drop-weight and tubular writing instrument | — | 1991-03-19 |
| 4900176 | Pivotable pen tip | Klaus-Joachim Meinert | 1990-02-13 |