Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5338848 | Indolizinetrimethine dyes | Michael Acker, Michael Schmitt | 1994-08-16 |
| 5282894 | Use of a liquid containing IR dyes as printing ink | Friedrich Closs, Juergen Kipper, Walter Kurtz, Karin H. Beck, Rudolf Griebel | 1994-02-01 |