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Carl Freudenberg
| Carl Freudenberg Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090301308 | Filter Arrangement for Fuel Cell - A filter arrangement for cleaning fuel cell supply air, including at least two filter layers, whereby a first filter layer is designed as a coarse filter and a second filter layer as a fine filter, wherein the second filter layer includes an electret filter material. | 12-10-2009 |