Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4988752 | Colored thermoplastic resin composition | Rainer Hamprecht, Michael Kressner | 1991-01-29 |
| 4386195 | Dyestuff preparations, processes for their production and their use for dyeing plastics | Fritz Bremer, Michael Kressner, Karlheinz Wolf, Konrad Nonn, Reinhold Hornle | 1983-05-31 |
| 4332587 | Colorant preparations, a process for their production and their use for coloring plastics | Michael Kressner, Joachim Kolbe, Fritz Bremer, Karlheinz Wolf, Ferdinand Kummeler | 1982-06-01 |