Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5951729 | Filter for the air intake of an internal combustion engine | Volker Ernst, Rudolf Leipelt, Bruno M. Sommer | 1999-09-14 |
| 5899378 | Plastic housing | Rudi Hainle, Rudolf Leipelt | 1999-05-04 |
| 5776568 | Hollow body with an internal supporting frame | Heinz Andress, Arnold Kuhn | 1998-07-07 |
| 5725624 | Air filter for the intake air of an internal-combustion engine | Volker Ernst | 1998-03-10 |
| 5698098 | Oil filter housing including a valved drain opening | Volker Ernst, Rudolf Leipelt | 1997-12-16 |
| 5695633 | Oil filter support tube and housing cover with snap detent connection therebetween | Volker Ernst, Herbert Jainek | 1997-12-09 |
| 5622583 | Method of producing a filter insert | Volker Ernst, Michael Kolmeder, Bernhard Wimmer | 1997-04-22 |
| 5560330 | Intake manifold and process for making it | Heinz Andress, Volker Ernst, Rolf Fuesser, Rudolf Leipelt | 1996-10-01 |
| 5554205 | Air filter for the interior of a motor vehicle | Volker Ernst, Rudolf Leipelt | 1996-09-10 |
| 5501723 | Activated carbon filter for venting a fuel tank | Heinz Andress, Karl-Ernst Hummel, Thomas Schermuly | 1996-03-26 |
| 5472379 | Air filter for the interior of motor vehicles | Heinz Andress, Christof Mangold, Hermann Maurer | 1995-12-05 |
| 5421307 | Arrangement for controlling the temperature of the intake air of internal-combustion engines | Heinz Andress, Heinz Muller, Herbert Seidl | 1995-06-06 |
| 5391212 | Filter system, especially for filtering the air intake of an internal combustion engine | Volker Ernst, Rudolf Leipelt | 1995-02-21 |
| 5137557 | Suction air filter for combustion engines | Bernhard Behrendt, Friedrich Benning, Volker Ernst, Herbert Gelb, Rudolf Leipelt +2 more | 1992-08-11 |
| 5127684 | Tension clamp | Rudolf Leipelt | 1992-07-07 |
| 5120337 | Intake air filter for the internal combustion engine of a motor vehicle | Heinz Benzler, Volker Ernst | 1992-06-09 |
| 5042999 | Air intake filter for internal combustion engines | Volker Ernst, Rudolf Leipelt | 1991-08-27 |
| 5030264 | Air intake filter for an internal combustion engine | Peter Kupke, Rudolf Leipelt | 1991-07-09 |
| 4881292 | Housing attachment assembly with a plastic attachment tab and a clip | Richard Hoferer, Volker Lehmann, Gunter Trumpfheller | 1989-11-21 |
| 4213643 | Knee lever lock for air filter covers and the like | Karl Blind | 1980-07-22 |