Issued Patents All Time
Showing 51–67 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8097054 | Dust filter bag | Jan Schultink | 2012-01-17 |
| 8092562 | Holding plate for a vacuum cleaner filter bag | Jan Schultink | 2012-01-10 |
| 8080076 | Nonwoven layer for a filter and filter medium | Jan Schultink | 2011-12-20 |
| 8070858 | Filter bag for a vacuum cleaner and use thereof | Jan Schultink | 2011-12-06 |
| 8066803 | Vacuum cleaner filter bag | Jan Schultink | 2011-11-29 |
| 8052769 | Filter bag and method for the production thereof | Jan Schultink | 2011-11-08 |
| 7744680 | Vacuum-cleaner bag and method for extending the service life of vacuum-cleaner bags | Jan Schultink | 2010-06-29 |
| 7582142 | Absorbing agent, dust collection chamber and method for adsorbing odours | Jan Schultink | 2009-09-01 |
| 5981287 | Method for the investigation of house dust | Norman Sinclair, Heike Poch, Wolfgang Volker | 1999-11-09 |
| 5766283 | Dust filter bag for a vacuum cleaner | Germann Bumb, Stephan Peter Dieudonne, Ludger Helmes, Stefan Kraut-Reinkober, Bastiaan Schultink | 1998-06-16 |
| 5544186 | Gas laser for emitting light modulated at two different wavelengths and an arrangement incorporating the gas laser to detect a gaseous substance | Wolfgang Rupp, Alexander Hinz | 1996-08-06 |
| D365552 | Keyboard | Kai-Uwe Marquardt | 1995-12-26 |
| 5468271 | Dust filter bag for a vacuum cleaner | Stefan Kraut-Reinkober, Ludger Helmes, Werner Hoyer | 1995-11-21 |
| 5359166 | Keyboard, especially for electronic data-processing apparatuses | Heinz Elsaesser, Kurt Klaiber | 1994-10-25 |
| D346376 | Keyboard | Kai-Uwe Marquardt | 1994-04-26 |
| D341134 | Keyboard | Kai-Uwe Marquardt, Ekkehard Sachs | 1993-11-09 |
| D340445 | Dual component keyboard unit | Kai-Uwe Marquardt, Ekkehard Sachs | 1993-10-19 |