Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5739530 | Method and device for the introduction of ions into quadrupole ion traps | Jochen Franzen, Yang Wang | 1998-04-14 |
| 5521379 | Method of selecting reaction paths in ion traps | Jochen Franzen | 1996-05-28 |
| 5438195 | Method and device for the digital generation of an additional alternating voltage for the resonant excitation of ions in ion traps | Jochen Franzen, Gerhard Heinen | 1995-08-01 |
| 5386113 | Method and device for in-phase measuring of ions from ion trap mass spectrometers | Jochen Franzen, Gerhard Heinen, Gerhard Weiss | 1995-01-31 |
| 5298746 | Method and device for control of the excitation voltage for ion ejection from ion trap mass spectrometers | Jochen Franzen | 1994-03-29 |
| 5028777 | Method for mass-spectroscopic examination of a gas mixture and mass spectrometer intended for carrying out this method | Jochen Franzen, Gerhard Heinen, Gerhard Weiss | 1991-07-02 |
| 4975577 | Method and instrument for mass analyzing samples with a quistor | Jochen Franzen, Gerhard Heinen, Gerhard Weiss | 1990-12-04 |
| 4882484 | Method of mass analyzing a sample by use of a quistor | Jochen Franzen, Gerhard Heinen, Gerhard Weiss | 1989-11-21 |