Granted Patents
- J. Dual, M. Sayir, J. Goodbread, " Viscometer ", US Patent Nr. 4 920 787, 1990, European Patent, Nr. 0 297 032, 1992
- J. Goodbread, M. Sayir, K. Häusler, J. Dual, Method and Device for Measuring the Characteristics of an Oscillating System, European Patent Nr. 0749 570, 1998,
US Patent Nr. 5837 885, 1998, Japanese Patent Nr. Hei 7-523205, 2004
- A. Haake, J. Dual, Method for positioning small particles in a fluid, European Patent Nr. EP1599865, 2008, US Patent Nr. 7601267, 2009
- J. Dual, F. May, O. Elsenhans, Method and apparatus for dispensing a liquid with a pipetting needle, European Patent Nr. EP1614469, 2004, US Patent Nr. 7615378, 2009
- M. Brunner, O. Elsenhans, V. Siljegovic, R. Hutter, J. Dual, F. May, Level sensor apparatus for detecting contact of a pipetting needle with a liquid in a vessel,
European Patent Nr. EP1596169, 2004, US Patent Nr. 7416706, 2008
- J. Dual, L. Bestmann, K. Häusler, Chemische Analyse mit Dynamischer Viskosimetrie, European Patent Nr. EP1680515, 2009, US Patent Nr. 7691570, 2010
- J. Dual, T. Brack, R. Vujanic, Method and device for multiple-frequency tracking of oscillating systems, US Patent 10,295,507, 2019