Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4773778 | Fabric printer ribbon comprising a liquid vehicle containing a decolorizable Lewis acid/Lewis base complex | Guenter Pietsch, Hubertus Greschenz | 1988-09-27 |
| 4596846 | Mechanically erasable printing liquid | Hans-Jurgen Rahn | 1986-06-24 |