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Ludwigsburg, Germany

Filterwerk Mann + Hummel Gmbh

USPTO Granted Patents = 303

CIPO Patents = 1

Trademarks = 5

Forward Citations = 6,248

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286 inventors (with patents filed for the assignee):

Arthur Klotz (29 out of 34 patents)

Rudolf Leipelt (27 out of 29 patents)

Volker Ernst (22 out of 23 patents)

4. Herbert Jainek (19 out of 43 patents)

5. Thomas Jessberger (17 out of 76 patents)

6. Herbert Pietrowski (12 out of 17 patents)

7. Heinz Mueller (12 out of 12 patents)

8. Helmut Neuschwander (11 out of 13 patents)

9. Martin Weindorf (10 out of 46 patents)

10. Klaus Moessinger (10 out of 15 patents)

11. Helmut Luka (10 out of 12 patents)

12. Bruno Sommer (10 out of 10 patents)

13. Heinz Andress (10 out of 10 patents)

14. Hans Erdmannsdoerfer (10 out of 10 patents)

15. Hans Erdmannsdorfer (10 out of 11 patents)

Core Competencies:

Centrifugal Separator

Liquid Filter

Air Intake Device

Filter Bypass Monitoring

Intake Manifold

Control Valve Assembly

Air Filtration System

Replaceable Filter Cartridge

Internal Combustion Engine

Cyclone Separator

Crankcase Ventilation

Fuel Filter

303 patents: Sort by Forward Citations

1. RE39704 - Centrifugal separator with weight thrust bearing (2007-06-25),

2. 7192518 - Liquid circuit (2007-03-20),

3. 7152745 - Filter bypass monitoring system (2006-12-26),

4. 7137510 - Filter element (2006-11-21),

5. 7025029 - Air intake tube for an internal combustion engine (2006-04-11),

6. 6994768 - Cylindrical filter element (2006-02-07),

7. 6973925 - Ventilation device for crankcase (2005-12-13),

8. 6966981 - Replaceable filter cartridge with support element and liquid filter with such a filter cartridge (2005-11-22),

9. RE38855 - Centrifugal separator with one or more internal contaminant barriers (2005-10-24),

10. 6942709 - Switchable cyclone for separating particles or droplets from a fluid stream (2005-09-13),

11. 6911142 - Overhead return piping system (2005-06-28),

12. 6893571 - Method and apparatus for storing water separated from fuel (2005-05-17),

13. 6893561 - Liquid filter with a cast metal housing and method of producing the same (2005-05-17),

14. 6886517 - Intake device for an internal combustion engine having impulse charging (2005-05-03),

15. 6884273 - Multicell cyclone and method for producing it (2005-04-26),

Filterwerk Mann + Hummel GmbH is a leading global filtration specialist with over 75 years of experience in providing innovative filtration solutions for automotive and industrial applications. The company's products range from air, oil, fuel, and cabin filters to water filtration systems, helping improve air quality, engine performance, and overall efficiency in various industries.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

303 Patents

#2 in Ludwigsburg

#215 in Germany

#2,863 in the World

Ludwigsburg, Germany

Filterwerk Mann + Hummel Gmbh

Forward Citations = 6,248

286 inventors:

Arthur Klotz (29 out of 34 patents)

Rudolf Leipelt (27 out of 29 patents)

Volker Ernst (22 out of 23 patents)

4. Herbert Jainek (19 out of 43 patents)

5. Thomas Jessberger (17 out of 76 patents)

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