Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5656262 | Skin-coloring powder mixture | Sabine Hitzel, Roland Martin, Ralf Emmert | 1997-08-12 |
| 5600007 | Use of .alpha.-hydroxyketoalkyl derivatives as light protection filters | Roland Martin, Ingeborg Stein, Ulrich Heywang, Michael Schwarz | 1997-02-04 |