Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6454840 | Separation-column unit for a gas-chromatograph and method for making the same | Friedhelm Muller, Arno Steckenborn | 2002-09-24 |
| 6447581 | Gas flow switching device | Friedhelm Mueller, Arno Steckenborn | 2002-09-10 |