Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5922609 | Method for infrared-optical determination of the concentration of at least one chemical analyte in a liquid sample | Robert Kellner | 1999-07-13 |
| 5464587 | Luminescence-optical indicator for determining the activity of alkali metal ions in a sample solution | Sonja Draxler, Marco Jean-Pierre Leiner | 1995-11-07 |
| 5308581 | Substance of an optical fluorescence measuring arrangement for measuring the pH of a sample and optical sensor with such an indicator substance | Marco Jean-Pierre Leiner, Hellfried Karpf | 1994-05-03 |