Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904765 | Dye mixtures containing an oil-soluble dye and an acid-extractable dye | Bernd Derber | 1990-02-27 |
RD
Rudolf Denninger
Overall (All Time): #3,896,992 of 4,157,543Top 95%
1
Patents All Time