Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5324666 | Process for determining oxidizable substances contained in an aqueous sample liquid | Friedrich W. Siepmann | 1994-06-28 |
| 4898829 | Apparatus for the detection of biodegradable and toxic substances in aqueous solutions | Friedrich W. Siepmann | 1990-02-06 |
| 4748127 | Process for the detection of biodegradable and toxic substances in aqueous solutions | Friedrich W. Siepmann | 1988-05-31 |