Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D788047 | Touch screen for medical apparatus | Erwin Fremuth, Alfred Negraschis | 2017-05-30 |
| 5145573 | Marked mineral oils and method of marking mineral oils with basic dyes | Christos Vamvakaris | 1992-09-08 |
| 4315756 | Oil-soluble azo dye with N-substituted .beta.-naphthylamine as coupling component | Georg Zeidler, Johannes Dehnert, Guenter Hansen | 1982-02-16 |